Mechanism and kinetics of the isothermal thermodegradation of ethylene-propylene-diene (EPDM) elastomers

被引：53
|
作者：
Gamlin, CD [1 ]
Dutta, NK [1 ]
Choudhury, NR [1 ]
机构：
[1] Univ S Australia, ARC Special Res Ctr, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia
来源：
POLYMER DEGRADATION AND STABILITY | 2003年 / 80卷 / 03期
关键词：
EPDM elastomer; isothermal degradation; kinetics of degradation; activation energy; polyolefins; thermogravimetric analysis;
D O I：
10.1016/S0141-3910(03)00036-3
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The thermal degradation behavior of a range of ethylene-propylene-diene (EPDM) elastomers, covering the whole range of composition, has been examined under isothermal conditions between 410 and 44 degreesC using thermogravimetric analysis. The kinetic parameters of degradation for the polymers have been evaluated using different mathematical models based on different proposed mechanisms of degradation. The experimental data were fitted to the models using non-linear regression analysis technique based on Marquardt-Levenberg algorithm. It appears that the degradation of EPDMs follows the Avrami-Erofeev two-dimensional nucleation model or a random chain-scission mechanism. No observable trend was found between the ethylene content of EPDM and the activation energy of degradation. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：525 / 531
页数：7
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