Thermal degradation kinetics of uncapped and end-capped poly(propylene carbonate)

被引：130

作者：

Peng, SW ^{[1
]}

An, YX ^{[1
]}

Chen, C ^{[1
]}

Fei, B ^{[1
]}

Zhuang, YG ^{[1
]}

Dong, LS ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

来源：

POLYMER DEGRADATION AND STABILITY | 2003年 / 80卷 / 01期

关键词：

poly(propylene carbonate); thermal degradation; TG; kinetics;

D O I：

10.1016/S0141-3910(02)00395-6

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In order to improve its thermal stability, poly(propylene carbonate)(PPC) was end-capped by different active agents. Thermogravimetric data show that the degradation temperature of uncapped PPC was lower than that of end-capped PPC. The kinetic parameters of thermal degradation of uncapped and end-capped PPC were calculated according to Chang's method. The results show that different mechanisms operate during the whole degradation temperature range for uncapped PPC. In the first stage, chain unzipping dominates the degradation. With increasing temperature, competing multi-step reactions occur. In the last stage, random chain scission plays an important role in degradation. For end-capped PPC, random chain scission dominates the whole degradation process. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：141 / 147

页数：7

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