This is my complete list of publications by topic. For a full list in reverse chronological order go here, and for a list by type of publication go here. Journal articles are marked in bold.

All of the journal articles below are either open access under the CC-BY license, and may be freely downloaded, or are open pre-print versions of the articles. All conference papers are also available to download freely.

Nanocomposites
Elastomers
Polymer Mechanics and Rheology
Medical polymer applications and devices
Crazing
Composites
Deployable Structures
Education
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Nanocomposites

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  1. Choong G.Y.H., De Focatiis D.S.A., Lidgett M.J., Thornton M.J. and Clifford M.J. (2019) Challenges to the industrial melt-processing of conductive plastics. In AIP Conference Proceedings 2055 (22 Jan 2019), 090003. (URL)
  2. Choong G.Y.H., De Focatiis D.S.A., Lidgett M.J., Thornton M. and Clifford M.J. (2017) Challenges to the industrial melt-processing of conductive plastics. In Proceedings of the 2017 Europe/Africa regional meeting of the Polymer Processing Society, Dresden (Germany).
  3. Ward M., Tomczynska M.M., Grant D.M., Parsons A.J. and De Focatiis D.S.A. (2016) The influence of process conditions on the structure and properties of melt processed poly (lactic acid) nanohydroxyapatite composites. In 3rd International Conference on Bio-based Polymers and Composites, Szeged (Hungary).
  4. Tomczynska M.M., Ward M., Choong G.Y.H., Walton K., De Focatiis D.S.A., Grant D.M., Irvine D.J. and Parsons A.J. (2016) Processing and properties of PLA-HA nanocomposites: the effect of particle morphology and dispersants. In Proceedings of the 32nd International Conference of the Polymer Processing Society, Lyon (France).
  5. De Focatiis D.S.A. (2016) Plastics Inside Us: how polymers and biopolymers can be used in medical contexts. Medical Plastics News, May-June 2016:30-31. (URL)
  6. Tomczynska M.M., Choong G.Y.H., De Focatiis D.S.A., Grant D.M. and Parsons A.J. (2015) Compounding and rheometry of PLA nanocomposites with coated and uncoated hydroxyapatite nanoplatelets. In Proceedings of the 2015 Europe/Africa regional meeting of the Polymer Processing Society, Graz (Austria).
  7. Choong G.Y.H., Lew C.Y. and De Focatiis D.S.A. (2015) The Role of Processing History on the Mechanical and Electrical Behaviour of Melt-Compounded Polycarbonate - Multi-walled Carbon Nanotube Nanocomposites. Journal of Applied Polymer Science, 69:42277. (URL)
  8. Choong G.Y.H., Hassell D.G. and De Focatiis D.S.A. (2013) Relaxation processes in polymer nanocomposites. In Physical Aspects of Polymer Science (IOP), Sheffield (UK).
  9. Choong G.Y.H., De Focatiis D.S.A. and Hassell D.G. (2013) Viscoelastic melt rheology and time-temperature superposition of polycarbonate – multi walled carbon nanotube nanocomposites. Composites Part A: Applied Science and Manufacturing, 52(8):801-814. (URL)
  10. Choong G.Y.H., De Focatiis D.S.A. and Hassell D.G. (2012) Viscoelastic melt rheology and time-temperature superposition of polycarbonate – multi walled carbon nanotube nanocomposites. In Proceedings of the 28th International Conference of the Polymer Processing Society (PPS28), Pattaya (Thailand).
  11. Choong G.Y.H., Lew C.Y., Hassell D.G. and De Focatiis D.S.A. (2011) Rheological behaviour of polycarbonate-multiwall carbon nanotube nanocomposites. In 7th Annual European Rheology Conference, Suzdal (Russia).

Elastomers

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  1. Ramli R., Chai A.B., Ho J.H., Kamaruddin S., Rasdi F.R.M., De Focatiis D.S.A., Ong S.K. and Bachmann R.T. (2024) Effects of oil palm trunk biochar as filler on physical and mechanical properties of deproteinised and epoxidized natural rubber latex foam natural rubber latex foam. Journal of Rubber Research, 27:623-637. (URL)
  2. De Focatiis, D.S.A. and Fernandes V.A. (2023) Process-induced anisotropy and its effect on swelling of elastomers: theory and experiments. In Proceedings of the 38th International Conference of the Polymer Processing Society (PPS38), St Gallen (Switzerland). (URL)
  3. Ramli R., Chai A.B., Kamaruddin S., Ho J.H. and De Focatiis D.S.A. (2023) Compressive Stress-Strain and Rebound Resilience Properties of Deproteinized Natural Rubber Latex Foam. Key Enginering Materials, 962:39-44. (URL)
  4. Ramli R., Chai A.B., Kamaruddin S., Ho J.H. and De Focatiis D.S.A. (2023) Development of Deproteinized Natural Rubber Latex Foam for Seat Cushions. Key Enginering Materials, 962:29-37. (URL)
  5. Das, A., Bortner M.J., De Focatiis D.S.A. and Dillard D. (2023) Adhesion and frictional slippage of elastomer disks compressed between rigid platens and subjected to torsion: implications for rheometry. In 2023 Adhesion Society Meeting, Orlando (FL). (URL)
  6. Ramli R., Chai A.B., Ho J.H., Kamaruddin S., Rubaizah F.R.M., De Focatiis D.S.A., Ong S. K. and Bachmann R.T. (2023) Effects of oil palm trunk biochar on the thermal stability and acoustic properties of specialty natural rubber latex foam. Journal of Rubber Research, 26:1-15. (URL)
  7. Ramli R., Chai A.B., Kamaruddin S., Rubaizah F.R.M., Ho J.H., De Focatiis D.S.A. and Goh K.T. (2022) Natural rubber latex foam technology for bedding industry. Science, Engineering and Health Studies, 16:22010003. (URL)
  8. Ramli R., Chai A.B., Kamaruddin S., Ho J.H., Rubaizah F.R.M. and De Focatiis D.S.A. (2022) The acoustic properties of latex foam made from deproteinizednatural rubber latex and epoxidized natural rubber latex. Journal of Rubber Research, 25:321-336. (URL)
  9. Fernandes V. A. and De Focatiis D.S.A. (2022) Anisotropic swelling of rubber: extension of the Flory theory and swelling experiments. Journal of Rubber Research, 25:401-412. (URL)
  10. Elsmore M.T., Atkinson R.L., Irvine D.J., Howdle S.M. and De Focatiis D.S.A. (2022) Sustainable terpene triblock copolymers with tuneable properties for pressure sensitive adhesive applications. Polymer Testing, 109:107530. (URL)
  11. Ramli R., Chai A.B., Ho J.H., Kamaruddin S., Rubaizah F.R.M. and De Focatiis D.S.A. (2022) Specialty natural rubber latex foam: foamability study and fabrication process. Rubber Chemistry and Technology, 95(3):492-513. (URL)
  12. Ramli R., Chai A.B., Ho J.H., Kamaruddin S., Rubaizah F.R.M. and De Focatiis D.S.A. (2022) Preparation and characterisation of specialty natural rubber latex concentrate. Rubber Chemistry and Technology, 95(1):101-118. (URL)
  13. Ramli R., Chai A.B., Ho J.H., Kamaruddin S., Rubaizah F.R.M., Rasdi M. and De Focatiis D.S.A. (2021) Specialty natural rubber latex foam: foamability study and fabrication process. Rubber Chemistry and Technology, 12. (URL)
  14. Ramli R., Chai A.B., Kamaruddin S., Ho J.H., Rubaizah F.R.M. and De Focatiis D.S.A. (2021) Development of Latex Foam Pillows from Deproteinized Natural Rubber Latex. Journal of Rubber Research, 24:615-630. (URL)
  15. Foerster A., Annarasa V., Terry A., Wildman R., Hague R., Irvine D., De Focatiis D.S.A. and Tuck C. (2021) UV-curable silicone materials with tuneable mechanical properties for 3D Printing. Materials & Design, 205 (July):109681. (URL)
  16. Atkinson R.L., Monaghan O.R., Elsmore M.T., Topham P.D., Toolan D.T.W., Derry M.J., Taresco V., Stockman R.A., De Focatiis D.S.A., Irvine D.J. and Howdle S.M. (2021) RAFT Polymerisation of Renewable Terpene (Meth)acrylates and the Convergent Synthesis of Methacrylate-Acrylate-Methacrylate Triblock Copolymers. Polymer Chemistry, 12:3177-3189. (URL)
  17. Elsmore M.T. and De Focatiis D.S.A. (2021) Combined roles of temperature and humidity on cure of a silicone elastomer. Polymer Testing, 93:106967. (URL)
  18. Annarasa V., Popov A. and De Focatiis D.S.A. (2020) A phenomenological constitutive model for the viscoelastic deformation of elastomers. Mechanics of Time-dependent Materials, 24:463–479. (URL)
  19. Annarasa V., Popov A.A. and De Focatiis D.S.A. (2019) Influence of carbon black morphology and content on the Payne effect in shear in styrene butadiene rubber exposed to varying uniaxial tensile histories. In International Rubber Conference 2019 (IRC2019), London (UK).
  20. De Focatiis D.S.A. and Rahmeh M. (2019) A simple physically-inspired n-chain model for the elastic deformation of elastomers exhibiting anisotropic Mullins softening. In International Rubber Conference 2019 (IRC2019), London (UK).
  21. Corby M. and De Focatiis D.S.A. (2019) Reversibility of the Mullins Effect for Extending the Life of Rubber Components. Plastics, Rubber and Composites: Macromolecular Engineering, 48(1):24-31. (URL)
  22. Annarasa V., Popov A.A. and De Focatiis D.S.A. (2018) A phenomenological constitutive model for the viscoelastic deformation of elastomers including the Mullins effect. In 11th International Conference on Mechanics of Time Dependent Materials, Milan (Italy).
  23. Corby M. and De Focatiis D.S.A. (2016) Reversibility of the Mullins Effect for Extending the Life of Rubber Components. In Innovations in Rubber Design, IoM3 conference, London (UK).
  24. De Focatiis D.S.A. and Kelly S. (2016) An adaptor, a modified stress testing device and a method of performing a multi-axial stress test, International Patent Application. International Patent Application, WO 2016/120629 A1. (URL)
  25. McGregor O.P., De Focatiis D.S.A. and Harper L.T. (2015) The use of elastomeric diaphragms in composite forming processes. In Rubber in Engineering Group (IOM3) Afternoon Technical Discussion, London (UK).
  26. Fernandes V.A. and De Focatiis D.S.A. (2015) A swelling study of process-induced and deformation-induced anisotropy of filled rubbers. In Proceedings of the IXth European Conference on Constitutive Models for Rubber, Prague (Czech Republic).
  27. Fernandes V.A. and De Focatiis D.S.A. (2015) Mechanical deformation of Elastomers: a comparison between cyclic energy dissipation and stress Relaxation following complex strain histories. In 16th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  28. De Focatiis D.S.A. and Kelly S.D. (2015) A novel mechanism for large strain biaxial tensile testing of polymeric materials using uniaxial test machines. In 16th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  29. De Focatiis D.S.A. and Kelly S. (2015) An adaptor, a modified stress testing device and a method of performing a multi-axial stress test. UK Patent Application, GB1501599.3. (URL)
  30. Fernandes V.A. and De Focatiis D.S.A. (2014) The role of deformation history on stress relaxation and stress memory of filled rubber. Polymer Testing, 40:124-132. (URL)
  31. Fernandes V.A. and De Focatiis D.S.A. (2014) Stress relaxation, stress recovery and stress memory of filled EPDM rubber. In RubberCon 2014: Advanced Engineering & Materials Developments, Manchester (UK).
  32. Fernandes V.A. and De Focatiis D.S.A. (2012) Multi-axial Mullins effect in EPDM subjected to complex strain histories. In Rubber Reinforcement by Fillers, Fibres and Textiles conference (IOM3), London (UK).
  33. De Focatiis D.S.A., Hull D. and Sanchez-Valencia A. (2012) Simultaneous measurement of mechanical and electrical properties of conductive elastomers for strain sensor applications. In Proceedings of the 16th International Workshop on Advances in Experimental Mechanics, Portoroz (Slovenia).
  34. De Focatiis D.S.A., Hull D. and Sanchez-Valencia A. (2012) Roles of pre-strain and hysteresis on piezoresistance in conductive elastomers for strain sensor applications. Plastics, Rubber and Composites: Macromolecular Engineering, 41(7):301-309. (URL)
  35. Buckley C.P., De Focatiis D.S.A. and Prisacariu C. (2012) New insight into the origins and modelling of the Mullins effect in thermoplastic elastomers. In Proceedings of the 15th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  36. De Focatiis D.S.A., Hull D. and Sanchez-Valencia A. (2012) Electromechanical hysteresis in filled elastomers. In Constitutive Models for Rubber VII, Proceedings of the 7th European Conference on Constitutive Models for Rubber (ECCMR 2011), Dublin (Ireland) (Jerrams S. and Murphy N., Eds.), pages 241-246.
  37. Buckley C.P., De Focatiis D.S.A. and Prisacariu C. (2012) Unravelling the mysteries of cyclic deformation in thermoplastic elastomers. In Constitutive Models for Rubber VII, Proceedings of the 7th European Conference on Constitutive Models for Rubber (ECCMR 2011), Dublin (Ireland) (Jerrams S. and Murphy N., Eds.), pages 3-10.
  38. De Focatiis D.S.A., Abraham F. and Buckley C.P. (2010) Viscoelastic deformation of carbon-black filled EPDM rubber. In Modelling of Elastomeric Materials and Products Conference 2010, London (UK).
  39. De Focatiis D.S.A., Abraham F., Alshuth T. and Buckley C.P. (2010) Strain-dependent viscoelasticity in multiaxial deformation of filled EPDM rubber. In Tire Technology Conference, Tire Technology Expo 2010 (TireTech), Köln (Germany).
  40. De Focatiis D.S.A., Abraham F. and Buckley C.P. (2009) Multiaxial viscoelastic deformation of carbon-black filled EPDM rubber. In Constitutive Models for Rubber VI, Proceedings of the 6th European Conference on Constitutive Models for Rubber (ECCMR 2009), Dresden, (Germany) (Heinrich G., Kaliske M., Lion A. and Reese S., Eds.), pages 187-192.
  41. Prisacariu C., Scortanu E., De Simone A., De Focatiis D.S.A. and Buckley C.P. (2009) Hysteresis and Mullins effect in thermoplastic polyurethane elastomers derived from hard segments of variable conformational mobility. In Frontiers in Polymer Science, Mainz (Germany).
  42. De Focatiis D.S.A., Abraham F. and Buckley C.P. (2009) Viscoelastic deformation of carbon-black filled EPDM rubber. In Proceedings of the 14th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).

Polymer Mechanics and Rheology

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  1. De Focatiis D.S.A. (2014) Polymers unchained. International Innovation, 136: Technology (March):59-61. Research Media.
  2. Smerdova O., Graham R.S., Hutchings L.R., Gasser U. and De Focatiis D.S.A. (2013) Towards an understanding of the role of polydispersity in oriented polymers: a SANS study of molecular orientation in homopolymer bimodal blends. In Ecole de Physique des Houches: Macromolecules in Constrained Environments meeting, Les Houches (France).
  3. De Focatiis D.S.A. and Buckley C.P. (2012) A toolbox for parameter-free predictions of solid-state properties of glassy polymers. In Proceedings of the 28th International Conference of the Polymer Processing Society (PPS28), Pattaya (Thailand).
  4. De Focatiis D.S.A. and Buckley C.P. (2012) A toolbox for parameter-free predictions of solid-state properties of monodisperse glassy polymers with frozen-in molecular orientation. Journal of Polymer Science Part B: Polymer Physics, 50:1748-1756. (URL)
  5. De Focatiis D.S.A. and Buckley C.P. (2012) Predictions of multiple solid-state properties of oriented glassy polymers using a combined melt-solid, molecularly aware, constitutive model. In Proceedings of the 15th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  6. De Focatiis D.S.A. and Buckley C.P. (2011) Craze initiation in glassy polymers: quantifying the influence of molecular orientation. Polymer, 52(18):4045-4053. (URL)
  7. Buckley C.P. and De Focatiis D.S.A. (2011) Prediction of crazing and birefringence in oriented glassy polymers. In Proceedings of the Society of Plastics Engineers conference ANTEC 2011, Boston (MA).
  8. De Focatiis D.S.A. and Buckley C.P. (2011) Prediction of frozen-in birefringence in oriented glassy polymers using a molecularly-aware constitutive model allowing for finite molecular extensibility. Macromolecules, 44(8):3085–-3095. (URL)
  9. De Focatiis D.S.A. and Buckley C.P. (2010) Solid-state property predictions for oriented glassy polymers using a combined melt-solid constitutive model. In Proceedings of the 26th Annual Meeting of the Polymer Processing Society, Banff (Canada).
  10. De Focatiis D.S.A., Embery J. and Buckley C.P. (2010) Large deformations in oriented polymer glasses: experimental study and a new glass-melt constitutive model. Journal of Polymer Science Part B: Polymer Physics, 48(13):1449-1463. (URL)
  11. Buckley C.P., De Focatiis D.S.A. and Li H.X. (2009) Progress toward predicting deformation and yield in glassy polymers. In Proceedings of the 14th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  12. De Focatiis D.S.A. and Buckley C.P. (2009) Constitutive modelling of large deformations in oriented polymer glasses: bridging the gap between molecularly aware melt rheology and solid-state deformation. In Proceedings of the 14th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  13. De Focatiis D.S.A., Embery J. and Buckley C.P. (2008) Solid-State Constitutive Modelling of Glassy Polymers: Coupling the Rolie-Poly Equations for Melts with Anisotropic Viscoplastic Flow. In Proceedings of the XVth International Congress on Rheology, Monterey (CA).
  14. De Focatiis D.S.A. and Buckley C.P. (2008) A New Solid-State Constitutive Model for Melt-state Oriented Amorphous Polymer Products. In Proceedings of the 24th Annual Meeting of the Polymer Processing Society, Salerno (Italy).
  15. De Focatiis D.S.A. and Buckley C.P. (2007) The Effects of Molecular Orientation on the Constitutive Response of Polystyrene. In Proceedings of the Europe/Africa 2007 Regional Meeting of the Polymer Processing Society, Gothenberg (Sweden).
  16. Buckley C.P., De Focatiis D.S.A. and Li H.X. (2006) The Role of Molecular Structure in Large Deformations of Amorphous Polymers. In Euromech Colloquium 487 on Structure Sensitive Mechanics of Polymer Materials: Physical and Mechanical Aspects, Strasbourg (France).
  17. Buckley C.P. and De Focatiis D.S.A. (2006) Towards a Solid-State Constitutive Model for Polymer Products with Process-Induced Molecular Orientation. In Proceedings of the 22nd Annual Meeting of the Polymer Processing Society, Yamagata (Japan).
  18. Wang, X.Y.L., De Focatiis, D.S.A., Scurr, D.J. and Irvine, D.J. (2024) Native state characterisation of lubricating grease using a multitechnique approach. In Proceedings of the 24th International Conference on Secondary Ion Mass Spectrometry, La Rochelle, France. (URL)
  19. Wang, X.Y.L., De Focatiis, D.S.A., Scurr, D.J. and Irvine, D.J. (2024) Native state 3D chemical imaging of polyurea grease using cryo-SIMS imaging and depth profiling. In Proceedings of the 1) UK Surface Analysis Forum (UKSAF), University of Surrey, UK. (URL)
  20. Das A., Choong G.Y.H., Dillard D.A., De Focatiis D.S.A. and Bortner M. (2022) Characterizing Friction in Fiber Reinforced Composites: Method Development and Effect of Process Parameters. Composites Part B, 236:109777. (URL)
  21. Elsmore M.T., Ryan J., Atkinson R., Irvine D.J. and De Focatiis D.S.A. (2021) A comparison of two rheological techniques for determining the longest relaxation time of amorphous polymers. In 14th Annual European Rheology Conference, Cyberspace (online).
  22. Ryan J., Elsmore M.T., Binner E., De Focatiis D.S.A., Irvine D. and Robinson J. (2021) Solvent-free Manufacture of Methacrylate Polymers from Biomass Pyrolysis Products. Reaction Chemistry & Engineering, 6:335. (URL)
  23. Stępień M., Choong G.Y.H., De Focatiis D.S.A. and Figiel Ł. (2020) Modeling non-linear rheology of PLLA: comparison of Giesekus and Rolie-Poly constitutive models. International Journal of Biobased Plastics, 2(1):13-28. (URL)
  24. Elsmore M.T. and De Focatiis D.S.A. (2020) Miniaturised testing techniques for the characterisation of novel polymers. In Proceedings of the 36th International Conference of the Polymer Processing Society, Montreal (Canada).
  25. Elsmore M.T., Irvine D.J. and De Focatiis D.S.A. (2019) Characterisation of novel polymers using pre scale-up material quantities. In British Society of Rheology's Non-Newtonian Club meeting, Nottingham (UK).
  26. Choong G.Y.H., De Focatiis D.S.A., Lidgett M.J., Thornton M.J. and Clifford M.J. (2019) Challenges to the industrial melt-processing of conductive plastics. In AIP Conference Proceedings 2055 (22 Jan 2019), 090003. (URL)
  27. Pepper K.J., Masson T., De Focatiis D.S.A. and Howdle S.M. (2018) Can a Combination of Poly(ethylene glycol) and Dense Phase Carbon Dioxide Improve Processing of Poly(lactic acid)? A High Pressure Rheology Investigation. Journal of Supercritical Fluids, 133(1):343-348. (URL)
  28. Choong G.Y.H., De Focatiis D.S.A., Lidgett M.J., Thornton M. and Clifford M.J. (2017) Challenges to the industrial melt-processing of conductive plastics. In Proceedings of the 2017 Europe/Africa regional meeting of the Polymer Processing Society, Dresden (Germany).
  29. Sanchez-Valencia A., Graham R.S. and De Focatiis D.S.A. (2016) Assessment of linear and non-linear rheological theories using monodisperse, bimodal and polydisperse polystyrene systems. In The XVIIth International Congress on Rheology, Kyoto (Japan).
  30. Choong G.Y.H. and De Focatiis D.S.A. (2016) A method for the determination and correction of the effect of thermal degradation on the viscoelastic properties of degradable polymers. In The XVIIth International Congress on Rheology, Kyoto (Japan).
  31. De Focatiis D.S.A. and Choong G.Y.H. (2016) Application of a thermal degradation model for polylactides to polymers of different molar mass and end group structure. In The XVIIth International Congress on Rheology, Kyoto (Japan).
  32. Choong G.Y.H. and De Focatiis D.S.A. (2016) A rheometric method to separate thermal degradation effects from the temperature dependence of relaxation time in poly(lactic acid). In Proceedings of the 10th International Conference on the Mechanics of Time Dependent Materials, Paris (France).
  33. Choong G.Y.H. and De Focatiis D.S.A. (2016) A method for the determination and correction of the effect of thermal degradation on the viscoelastic properties of degradable polymers. Polymer Degradation and Stability, 130:182-188. (URL)
  34. Curia S., Barclay A., De Focatiis D.S.A. and Howdle S.M. (2015) Low temperature lipase-catalysed synthesis of renewable functional telechelics in scCO2. In 19th Annual Green Chemistry and Engineering Conference, Bethesda (Washington DC).
  35. Curia S., De Focatiis D.S.A. and Howdle S.M. (2015) High-pressure rheological analysis of CO2-induced melting point depression and viscosity reduction of poly(ε-caprolactone). Polymer, 69:17-24. (URL)
  36. Sanchez-Valencia A. and De Focatiis D.S.A. (2015) Craze initation of glassy polymers: the effect of molar mass distribution of homopolymer bimodal and multimodal polystyrene blends. In 16th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  37. Stepien M., Choong G.Y.H., De Focatiis D.S.A. and Figiel L. (2014) Elongational and shear rheological behaviour of polylactides: comparison of phenomenological (Giesekus) and molecularly-based (Rolie-Poly) models. In 6th International Conference on Polymer Behaviour, Vienna (Austria).
  38. Choong G.Y.H., Parsons A.J., Grant D.M. and De Focatiis D.S.A. (2014) Rheological techniques for determining degradation of polylactic acid in bioresorbable medical polymer systems. In Proceedings of the 30th Annual meeting of the Polymer Processing Society, Cleveland (OH).
  39. Choong G.Y.H., Hassell D.G. and De Focatiis D.S.A. (2013) Relaxation processes in polymer nanocomposites. In Physical Aspects of Polymer Science (IOP), Sheffield (UK).
  40. Choong G.Y.H., De Focatiis D.S.A. and Hassell D.G. (2013) Viscoelastic melt rheology and time-temperature superposition of polycarbonate – multi walled carbon nanotube nanocomposites. Composites Part A: Applied Science and Manufacturing, 52(8):801-814. (URL)
  41. Crossley R.J., Schubel P.J. and De Focatiis D.S.A. (2013) Time-temperature equivalence in the tack and dynamic stiffness of polymer prepreg and its application to automated composites manufacturing. Composites Part A: Applied Science and Manufacturing, 52:126-133. (URL)
  42. Choong G.Y.H., De Focatiis D.S.A. and Hassell D.G. (2012) Viscoelastic melt rheology and time-temperature superposition of polycarbonate – multi walled carbon nanotube nanocomposites. In Proceedings of the 28th International Conference of the Polymer Processing Society (PPS28), Pattaya (Thailand).
  43. Choong G.Y.H., Lew C.Y., Hassell D.G. and De Focatiis D.S.A. (2011) Rheological behaviour of polycarbonate-multiwall carbon nanotube nanocomposites. In 7th Annual European Rheology Conference, Suzdal (Russia).
  44. De Focatiis D.S.A. and Buckley C.P. (2009) Constitutive modelling of large deformations in oriented polymer glasses: bridging the gap between molecularly aware melt rheology and solid-state deformation. In Proceedings of the 14th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  45. Buckley C.P., De Focatiis D.S.A. and Li H.X. (2009) Progress toward predicting deformation and yield in glassy polymers. In Proceedings of the 14th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  46. De Focatiis D.S.A., Embery J. and Buckley C.P. (2008) Solid-State Constitutive Modelling of Glassy Polymers: Coupling the Rolie-Poly Equations for Melts with Anisotropic Viscoplastic Flow. In Proceedings of the XVth International Congress on Rheology, Monterey (CA).
  47. De Focatiis D.S.A. and Buckley C.P. (2008) A New Solid-State Constitutive Model for Melt-state Oriented Amorphous Polymer Products. In Proceedings of the 24th Annual Meeting of the Polymer Processing Society, Salerno (Italy).

Medical applications and devices

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  1. Ward M., Tomczynska M.M., Grant D.M., Parsons A.J. and De Focatiis D.S.A. (2016) The influence of process conditions on the structure and properties of melt processed poly (lactic acid) nanohydroxyapatite composites. In 3rd International Conference on Bio-based Polymers and Composites, Szeged (Hungary).
  2. De Focatiis D.S.A. and Choong G.Y.H. (2016) Application of a thermal degradation model for polylactides to polymers of different molar mass and end group structure. In The XVIIth International Congress on Rheology, Kyoto (Japan).
  3. Choong G.Y.H. and De Focatiis D.S.A. (2016) A method for the determination and correction of the effect of thermal degradation on the viscoelastic properties of degradable polymers. In The XVIIth International Congress on Rheology, Kyoto (Japan).
  4. Tomczynska M.M., Ward M., Choong G.Y.H., Walton K., De Focatiis D.S.A., Grant D.M., Irvine D.J. and Parsons A.J. (2016) Processing and properties of PLA-HA nanocomposites: the effect of particle morphology and dispersants. In Proceedings of the 32nd International Conference of the Polymer Processing Society, Lyon (France).
  5. De Focatiis D.S.A. (2016) Plastics Inside Us: how polymers and biopolymers can be used in medical contexts. Medical Plastics News, May-June 2016:30-31. (URL)
  6. Choong G.Y.H. and De Focatiis D.S.A. (2016) A rheometric method to separate thermal degradation effects from the temperature dependence of relaxation time in poly(lactic acid). In Proceedings of the 10th International Conference on the Mechanics of Time Dependent Materials, Paris (France).
  7. Choong G.Y.H. and De Focatiis D.S.A. (2016) A method for the determination and correction of the effect of thermal degradation on the viscoelastic properties of degradable polymers. Polymer Degradation and Stability, 130:182-188. (URL)
  8. Mauri A., Ehret A.E., De Focatiis D.S.A. and Mazza E. (2016) A model for the compressible, viscoelastic behavior of human amnion addressing tissue variability through a single parameter. Biomechanics and Modeling in Mechanobiology, 15(4):1005-1017. (URL)
  9. Tomczynska M.M., Choong G.Y.H., De Focatiis D.S.A., Grant D.M. and Parsons A.J. (2015) Compounding and rheometry of PLA nanocomposites with coated and uncoated hydroxyapatite nanoplatelets. In Proceedings of the 2015 Europe/Africa regional meeting of the Polymer Processing Society, Graz (Austria).
  10. Ward M., Brisse A.-L., Choong G.Y.H., Parsons A.J., Grant D.M. and De Focatiis D.S.A. (2015) Mechanical response and structure evolution of degrading medical polylactides for resorbable nanocomposite implants. In 16th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  11. Mauri A., Ehret A.E., De Focatiis D.S.A. and Mazza E. (2015) Characterization and modeling of the mechanical behavior of human amnion. In 16th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  12. Ehret A.E., Mauri A., Perrini M., De Focatiis D.S.A. and Mazza E. (2015) A continuum model to rationalise the time-dependent kinematic and stress responses of human amnion. In EUROMECH Colloquium 560: Mechanics of Biological Membranes, Ascona (Switzerland).
  13. Mauri A., Perrini M., Ehret A.E., De Focatiis D.S.A. and Mazza E. (2015) Time-Dependent Mechanical Behavior of Human Amnion: Macroscopic and Microscopic Characterization. Acta Biomaterialia, 11:314-323. (URL)
  14. Parsons A.J., Cope G., Frimpong A. and De Focatiis D.S.A. (2012) Competition between degradation and crystallisation on creep compliance of degrading poly(lactic acid) for medical implants. In Proceedings of the 9th World Biomaterials Congress, Chengdu (China).
  15. De Focatiis D.S.A. (2003) Inverting Domes for Needle-less Powder Injection. PhD thesis (URL)
  16. De Focatiis D.S.A. (2000) Modelling and Assessment of Inverting Domes for Needle-less Powder Injection. Transfer of Status to DPhil Report, University of Oxford

Crazing

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  1. Sanchez-Valencia A., Smerdova O., Hutchings L.R. and De Focatiis D.S.A. (2017) Roles of blending and of molecular weight distribution on craze initiation. Macromolecules, 50(23):9507-–9514. (URL)
  2. Sanchez-Valencia A. and De Focatiis D.S.A. (2015) Craze initation of glassy polymers: the effect of molar mass distribution of homopolymer bimodal and multimodal polystyrene blends. In 16th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  3. De Focatiis D.S.A., Mala S.M. and Buckley C.P. (2014) Mechanisms of craze formation in glassy polymers: the role of molecular orientation. In 7th International Conference on Fracture of Polymers, Composites and Adhesives, Les Diablerets (Switzerland).
  4. De Focatiis D.S.A. (2014) Polymers unchained. International Innovation, 136: Technology (March):59-61. Research Media.
  5. De Focatiis D.S.A. and Buckley C.P. (2012) A toolbox for parameter-free predictions of solid-state properties of glassy polymers. In Proceedings of the 28th International Conference of the Polymer Processing Society (PPS28), Pattaya (Thailand).
  6. De Focatiis D.S.A. and Buckley C.P. (2012) A toolbox for parameter-free predictions of solid-state properties of monodisperse glassy polymers with frozen-in molecular orientation. Journal of Polymer Science Part B: Polymer Physics, 50:1748-1756. (URL)
  7. De Focatiis D.S.A. and Buckley C.P. (2012) Predictions of multiple solid-state properties of oriented glassy polymers using a combined melt-solid, molecularly aware, constitutive model. In Proceedings of the 15th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  8. De Focatiis D.S.A. and Buckley C.P. (2011) Craze initiation in glassy polymers: quantifying the influence of molecular orientation. Polymer, 52(18):4045-4053. (URL)
  9. Buckley C.P. and De Focatiis D.S.A. (2011) Prediction of crazing and birefringence in oriented glassy polymers. In Proceedings of the Society of Plastics Engineers conference ANTEC 2011, Boston (MA).
  10. De Focatiis D.S.A., Martin C. and Parsons A.J. (2010) Time and temperature dependence of craze initiation in poly(lactic acid). In Proceedings of the Mechanics of Time Dependent Materials Conference 2010, Portoroz (Slovenia).
  11. De Focatiis D.S.A. and Buckley C.P. (2010) Solid-state property predictions for oriented glassy polymers using a combined melt-solid constitutive model. In Proceedings of the 26th Annual Meeting of the Polymer Processing Society, Banff (Canada).
  12. De Focatiis D.S.A., Buckley C.P. and Hutchings L.R. (2008) Roles of Chain Length, Architecture and Time in the Initiation of Visible Crazes in Polystyrene. Macromolecules, 41(12):4484-4491. (URL)
  13. De Focatiis D.S.A. and Buckley C.P. (2007) Environmental Stress Craze Initiation in Isotropic and Oriented Polystyrene: The Role of Chain Stretch in Disentanglement Crazing. In Proceedings of the Europe/Africa 2007 Regional Meeting of the Polymer Processing Society, Gothenberg (Sweden).
  14. De Focatiis D.S.A. and Buckley C.P. (2007) The Effects of Molecular Orientation on the Constitutive Response of Polystyrene. In Proceedings of the Europe/Africa 2007 Regional Meeting of the Polymer Processing Society, Gothenberg (Sweden).
  15. De Focatiis D.S.A., Buckley C.P. and Hutchings L.R. (2007) Environmental Stress Crazing in Polystyrene: the Roles of Chain Length and Architecture in Craze Initiation. In Proceedings of the Annual Technical Conference of the Society of Plastics Engineers (ANTEC) 2007, Cincinnati (OH).
  16. De Focatiis D.S.A. and Buckley C.P. (2008) Determination of Craze Initiation Stress in Very Small Polymer Samples. Polymer Testing, 27(2):136-145. (URL)
  17. De Focatiis D.S.A. and Buckley C.P. (2006) The Initiation of Environmental Stress Crazes in Polystyrenes with Process Induced Anisotropy. In Proceedings of the 22nd Annual Meeting of the Polymer Processing Society, Yamagata (Japan).
  18. De Focatiis D.S.A. and Buckley C.P. (2006) The Role of Molecular Architecture and Length Distribution on the Environmental Stress Crazing of Polystyrene. In Proceedings of the 13th International Conference on the Deformation, Yield and Fracture of Polymers, Kerkrade (The Netherlands).
  19. De Focatiis D.S.A. and Buckley C.P. (2005) Measurement of Craze Initation Stress in Very Small Polymer Samples. In Proceedings of the 4th Youth Symposium on Experimental Solid Mechanics, Castrocaro Terme (Italy).
  20. Buckley C.P. and De Focatiis D.S.A. (2003) Environmental Stress Crazing of Polystyrene: Effects of Chain Length and Process Induced Chain Orientation. In Proceedings of the 26th Australasian Polymer Symposium, Noosa (Australia).

Composites

  1. Parsons A.J., Johnson M.S., Piano S. and De Focatiis D.S.A. (2025) Demanufacturing of Thermoplastic Composites: Small Scale Experiments Exploring Ply Separation and Recovery. Composites Part A: Applied Science and Manufacturing, 190:108626. (URL)
  2. Lingemann M., Harper L.T., Albertini, G., Parsons A.J., Johnson M.S. and De Focatiis D.S.A. (2024) Advancing circularity through demanufacturing – testing thermally assisted peeling of fibre reinforced thermoplastic tapes. In International Conference and Exhibition on Thermoplastic Composites (ITHEC). (URL)
  3. Molinar-Diaz, J., Harper, L.T., Turner, T., Warrior, N., Parsons, A. and De Focatiis, D.S.A. (2024) Micro-structural and crystalline evolution of PEEK-CF interfaces assessed via repeated thermocycling. In Proceedings of the 21st European Conference on Composite Materials, Nantes (France). (URL)
  4. De Focatiis, D.S.A., Endruweit, A. and Joesbury, A. (2024) The development of a test standard for the measurement of adhesive tack of composite prepregs. In Proceedings of the 9th International Conference on Fracture of Polymers, Composites and Adhesives , Les Diablereux (Switzerland). (URL)
  5. Gavalda-Diaz, O., Rylatt, P., Albertini, G., De Focatiis, D.S.A. and Warrior, N. (2023) Repair and joining of vitrimer carbon fibre reinforced polymers (vCFRPs). In Proceedings of the 23rd International Conference on Composite Materials (ICCM), Belfast (UK). (URL)
  6. Parsons A.J., Johnson M.S., Piano S. and De Focatiis D.S.A. (2022) Rewinding Tape Laying: Direct End-of-Life Recovery of Continuous Tapes. In International Conference and Exhibition on Thermoplastic Composites (ITHEC). (URL)
  7. Parsons A.J., Johnson M.S., Piano S. and De Focatiis D.S.A. (2022) Direct End-of-Life Recovery of Continuous Tapes by Peeling and Rewinding. In International Conference on Manufacturing of Advanced Composites 2022 (ICMAC). (URL)
  8. Choong G.Y.H., Endruweit A. and De Focatiis D.S.A. (2021) Time-temperature dependent adhesive tack and contact area development between prepreg carbon fibre tape and rigid substrate. In International Conference on Manufacturing of Advanced Composites 2021, online.
  9. Choong G.Y.H., Endruweit A. and De Focatiis D.S.A (2021) Analysis of contact area in a continuous application-and-peel test method for prepreg tack. International Journal of Adhesion and Adhesives, 107:102849. (URL)
  10. Smith A.W., Endruweit A., Choong G.Y.H., De Focatiis D.S.A. and Hubert P. (2020) Adaptation of material deposition parameters to account for out-time effects on prepreg tack. Composites Part A: Applied Science and Manufacturing, 133:105835. (URL)
  11. Endruweit A., Choong G.Y.H., Ghose S., Johnson B.A., Warrior N.A. and De Focatiis D.S.A. (2018) The effects of out-time, compaction and humidity on time-temperature dependent adhesive tack of pre-impregnated carbon fibre tapes for composites production. In 11th International Conference on Mechanics of Time Dependent Materials, Milan (Italy).
  12. Endruweit A., Choong G.Y.H. Ghose S., Johnson B.A., Younkin D.R., Warrior N.A. and De Focatiis D.S.A. (2018) Characterisation of tack for uni-directional prepreg tape employing a continuous application-and-peel test method. Composites Part A: Applied Science and Manufacturing, 114:295-306. (URL)
  13. Ghose S., Malik K.F., Johnson B.A., Endruweit A. and De Focatiis D.S.A. (2018) Slit tape buckling and AFP defect prediction. In Proceedings of the the 2018 meeting of the Society for the Advancement of Material and Process Engineering, Long Beach (CA).
  14. Chen, S., McGregor O.P.L., Endruweit A., Elsmore M., De Focatiis D.S.A., Harper L.T. and Warrior N.A. (2017) Double diaphragm forming simulation for complex composite structures. Composites Part A: Applied Science and Manufacturing, 95:346-358. (URL)
  15. Corbridge D.M., Harper L.T., De Focatiis D.S.A. and Warrior N.A. (2017) Compression moulding of composites with hybrid fibre architectures. Composites Part A: Applied Science and Manufacturing, 95:87-99. (URL)
  16. Corbridge D., Harper L.T., De Focatiis D.S.A. and Warrior N.A. (2015) Compression moulding of hybrid fibre architectures for structural automotive applications. In Proceedings of the the 2015 meeting of the Society for the Advancement of Material and Process Engineering (SAMPE), Amiens (France).
  17. Parsons A.J., Johnson M.S., Piano S. and De Focatiis D.S.A. (2025) Demanufacturing and Remanufacturing of Thermoplastic Composites: a Hot and Cold Peel Feasibility Study for Circularity. Composites Part A: Applied Science and Manufacturing, under review.

Deployable Structures

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  1. Tang Y., Beccarelli P., Guo H., Liu R., De Focatiis, D.S.A. and Deng, Z. (2022) Biomimetic folding of triangular deployable membranes. Bioinspiration & Biomimetics, 17:066002. (URL)
  2. De Focatiis D.S.A. and Guest S.D. (2002) Deployable Membranes designed from Folding Tree Leaves. Philosophical Transactions of the Royal Society of London, Series A, Mathematical Physical and Engineering Sciences, 360:227-238. (URL)
  3. De Focatiis D.S.A. and Guest S.D. (1999) New Deployable Membranes based on a Study of the Deployment of Tree Leaves. In Biomimetics 4, Reading (UK).
  4. De Focatiis D.S.A. (1999) Biomimetics and the Leaf-Fold Patterns. Master's thesis

Engineering Education

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  1. Hassell D.G. and De Focatiis D.S.A. (2016) Experiences on the Application of WIKI Based Coursework in a Fourth-Year Engineering Module. International Journal of Humanities and Social Sciences, 10(8):3080-3083. (URL)
  2. Hassell D.G. and De Focatiis D.S.A. (2016) Experiences on the application of Wiki-based coursework in a fourth year engineering module. In 18th International Conference on Education, Research and Innovation, Kuala Lumpur (Malaysia).
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