A new model for the kinetic analysis of thermal degradation of polymers driven by random scission |
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Authors: | Pedro E Sánchez-Jiménez Luis A Pérez-Maqueda Antonio Perejón José M Criado |
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Institution: | Instituto de Ciencia de Materiales de Sevilla, C.S.I.C.-Universidad de Sevilla, C. Américo Vespucio n°49, 41092 Sevilla, Spain |
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Abstract: | In this paper, a series of f(α) kinetic equations able to describe the random scission degradation of polymers is formulated in such a way that the reaction rate of the thermal degradation of polymers that go through a random scission mechanism can be directly related to the reacted fraction. The proposed equations are validated by a study of the thermal degradation of poly(butylene terephthalate) (PBT). The combined kinetic analysis of thermal degradation curves of this polymer obtained under different thermal pathways have shown that the proposed equation fits all these curves while other conventional models used in literature do not. |
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Keywords: | Kinetics Polymer degradation Random scission |
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