Non-isothermal cold crystallization kinetics of poly(3-hydoxybutyrate) filled with zinc oxide

被引：25

作者：

Ries, Andreas ^{[1
]}

Canedo, Eduardo L. ^{[2
]}

Souto, Cicero R. ^{[1
]}

Wellen, Renate M. R. ^{[3
]}

机构：

[1] Univ Fed Paraiba, Dept Elect Engn, BR-58051900 Joao Pessoa, Paraiba, Brazil

[2] Univ Fed Campina Grande, Dept Mat Engn, BR-58429900 Campina Grande, PB, Brazil

[3] Univ Fed Paraiba, Dept Mat Engn, BR-58051900 Joao Pessoa, Paraiba, Brazil

来源：

THERMOCHIMICA ACTA | 2016年 / 637卷

关键词：

Poly(3-hydoxybutyrate); Zinc oxide; Non-isothermal crystallization; Isoconversional model kinetic analysis; Kissinger activation energy; Friedman activation energy; KISSINGER EQUATION; PHASE-CHANGE; BIODEGRADATION; POLYMERS; BEHAVIOR;

D O I：

10.1016/j.tca.2016.06.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The non-isothermal cold crystallization kinetics of poly(3-hydroxybutyrate) (PHB) and PHB-ZnO composites, with ZnO content of 1%, 5% and 10% per weight, was investigated at different heating rates (5, 7.5, 10, 15, 20 and 30 degrees C/min) using differential scanning calorimetry. Both, Kissinger and Friedman activation energies predict correctly the slowest and fastest crystallizing composition. It was further found, that ZnO can neither be classified as a crystallization accelerator, nor as a crystallization inhibitor; its action is strongly concentration dependent. The empirical Pseudo-Avrami model has the best overall capability for fitting the experimental kinetic data. However, since the Pseudo-Avrami exponent was found to vary irregularly with heating rate and filler content, this model should not be applied for kinetic predictions of an arbitrary composition or an untested heating rate. In such cases, Mo's model should be used. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：74 / 81

页数：8

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