Thermal degradation of poly(methyl methacrylate) (PMMA): modelling of DTG and TG curves
Thermal degradation of poly(methyl methacrylate) (PMMA): modelling of DTG and TG curves
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DOI：
10.1016/s0141-3910(02)00291-4
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发表时间：
2003-02-01
影响因子：
5.9
通讯作者：
Mieloszynski, JL
中科院分区：
文献类型：
--
作者：
Ferriol, M;Gentilhomme, A;Mieloszynski, JL
用热重分析法研究了平均分子量为996，000和350，000 g mol（-1）的聚甲基丙烯酸甲酯（PMMA）在动态条件下，在2，5，8和10 K min（-1）四种不同升温速率下的热行为。在惰性气氛中，发现涉及四个降解步骤，支持先前在文献中研究的降解行为。假设有四个独立的反应，使用非线性拟合算法确定每个步骤的表观动力学参数，使我们能够在任何给定的实验条件下模拟PMMA的整体重量损失。(C)2002爱思唯尔科技有限公司版权所有。
The thermal behaviour of poly(methyl methacrylate) (PMMA) with average molecular weights of 996,000 and 350,000 g mol(-1) was investigated by thermogravimetric analysis in dynamic conditions at four different heating rates: 2, 5, 8 and 10 K min(-1). In inert atmosphere, four degradation steps were found to be involved supporting the degradation behaviour previously investigated in the literature. Assuming four independent reactions, the apparent kinetic parameters were determined for each step using a non-linear fitting algorithm allowing us to simulate the overall weight loss of PMMA in any given experimental conditions. (C) 2002 Elsevier Science Ltd. All rights reserved.