Kinetic model of poly(3-hydroxybutyrate) thermal degradation from experimental non-isothermal data

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Data

2009-04-01

Autores

Santos, A. F. [UNESP]
Polese, L. [UNESP]
Crespi, Marisa Spirandeli [UNESP]
Ribeiro, Clovis Augusto [UNESP]

Título da Revista

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Título de Volume

Editor

Springer

Resumo

The non-isothermal data given by TG curves for poly(3-hydroxybutyrate) (PHB) were studied in order to obtain a consistent kinetic model that better represents the PHB thermal decomposition. Thus, data obtained from the dynamic TG curves were suitably managed in order to obtain the Arrhenius kinetic parameter E according to the isoconversional F-W-O method. Once the E parameters is found, a suitable logA and kinetic model (f(alpha)) could be calculated. Hence, the kinetic triplet (E +/- SD, logA +/- SD and f(alpha)) obtained for the thermal decomposition of PHB under non-isothermal conditions was E=152 +/- 4 kJ mol(-1), logA=14.1 +/- 0.2 s(-1) for the kinetic model, and the autocatalytic model function was: f(alpha)=alpha(m)(1-alpha)(n)=alpha(0.42)(1-alpha)(0.56).

Descrição

Palavras-chave

biodegradable polymers, non-isothermal kinetic, PHB thermal degradation

Como citar

Journal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 96, n. 1, p. 287-291, 2009.