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Constant rate thermal analysis for thermal stability studies of polymers

 

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Author: Sánchez Jiménez, Pedro Enrique
Pérez Maqueda, Luis Allan
Perejón Pazo, Antonio
Criado Luque, José Manuel
Department: Universidad de Sevilla. Departamento de Química Inorgánica
Date: 2011
Published in: Polymer Degradation and Stability, 96, 974-981.
Document type: Article
Abstract: This 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.
Cite: Sánchez Jiménez, P.E., Pérez Maqueda, L.A., Perejón Pazo, A. y Criado Luque, J.M. (2011). Constant rate thermal analysis for thermal stability studies of polymers. Polymer Degradation and Stability, 96, 974-981.
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URI: https://hdl.handle.net/11441/82901

DOI: 10.1016/j.polymdegradstab.2011.01.027

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