Constant rate thermal analysis for thermal stability studies of polymers
Description
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.
Abstract
Junta de Andalucía TEP-03002
Abstract
Ministerio de Ciencia e Innovación MAT 2008-06619/MAT
Additional details
- URL
- https://idus.us.es/handle//11441/82901
- URN
- urn:oai:idus.us.es:11441/82901
- Origin repository
- USE