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Constant rate thermal analysis for thermal stability studies of polymers

AuthorsSánchez-Jiménez, P.E. ; Pérez-Maqueda, Luis A. ; Perejón, Antonio ; Criado Luque, J.M.
Issue Date2011
CitationPolymer Degradation and Stability 96: 974- 981 (2011)
AbstractThis paper explores the relationship between the shapes of temperature-time curves obtained from experimental data recorded by means of constant rate thermal analysis (CRTA) and the kinetic model followed by the thermal degradation reaction. A detailed shape analysis of CRTA curves has been performed as a function of the most common kinetic models. The analysis has been validated with simulated data, and with experimental data recorded from the thermal degradation of polytetrafluoroethylene (PTFE), poly(1,4-butylene terephthalate) (PBT), polyethylene (PE) and poly(vinyl chloride) (PVC). The resulting temperature-time profiles indicate that the studied polymers decompose through phase boundary, random scission, diffusion and nucleation mechanisms respectively. The results here presented demonstrate that the strong dependence of the temperature-time profile on the reaction mechanism would allow the real kinetic model obeyed by a reaction to be discerned from a single CRTA curve. © 2011 Elsevier Ltd. All rights reserved.
Identifiersdoi: 10.1016/j.polymdegradstab.2011.01.027
issn: 0141-3910
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