Technical Note: On modelling thermo-chemical degradation of poly(lactic acid)
| Autor: | John Summerscales, Peter Woodfield, Hossein Mohammad Khanlou, Wayne Hall, Michael T. Heitzman |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics Differential equation Thermodynamics Technical note 02 engineering and technology Invariant (physics) 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Isothermal process 0104 chemical sciences Lactic acid chemistry.chemical_compound Monomer chemistry Mechanics of Materials Thermal Thermo chemical Polymer chemistry Materials Chemistry 0210 nano-technology |
| Zdroj: | Polymer Degradation and Stability. 134:19-21 |
| ISSN: | 0141-3910 |
| DOI: | 10.1016/j.polymdegradstab.2016.09.033 |
| Popis: | A well-established model for simulation of the chain-scission process of polylacticacid (PLA) during thermal processing has been simplified and revised. The key assumption in the new model is that the total number of monomer units is invariant as reactions progress. Surprisingly, this seemingly obvious assumption appears to have been previously overlooked. The revised model no longer requires solution of simultaneous differential equations and, for isothermal conditions, an analytical solution is readily available. The present model is in excellent agreement with the more complex model and experimental results for PLA degradation reported in the literature. This simplified model has potential to be applied to other thermoplastics. |
| Databáze: | OpenAIRE |
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