Thermal-oxidative aging of DGEBA/EPN/LMPA epoxy system: Chemical structure and thermal-mechanical properties

被引：86
作者：
Pei, Yan-min [1 ]
Wang, Kai [1 ]
Zhan, Mao-sheng [1 ]
Xu, Wen [2 ]
Ding, Xiao-jun [2 ]
机构：
[1] Beihang Univ, Key Lab Aerosp Mat & Performance, Minist Educ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Aerosp Res Inst Mat & Proc Technol, Beijing 100076, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2011年 / 96卷 / 07期
关键词：
Epoxy resin; Thermal-oxidative aging; DMTA; ATR-FTIR; DEGRADATION; RESIN; CURE; TEMPERATURE; NETWORKS; KINETICS;
D O I：
10.1016/j.polymdegradstab.2011.04.019
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 evolvement of chemical structure and thermal mechanical properties of diglycidyl ether of bisphenol-A and novolac epoxy resin blends cured with low molecular polyamide (DGEBA/EPN/LMPA system) during thermal-oxidative aging were investigated by Attenuated Total Reflectance Fourier Transform Infrared spectrometry (ATR-FTIR) and Dynamic Mechanical Thermal Analysis (DMTA). The results revealed that the chemical reactions during thermal-oxidative aging contained oxidation and chain scission. Some possible chemical reaction processes were given. There was a new compound formed during aging processes and the change of its glass transition temperature (T-g) with aging time followed an exponential law. In addition, the changes of dynamic mechanical behavior of this epoxy system aged at four different temperatures (110 degrees C, 130 degrees C, 150 degrees C, 170 degrees C) were compared. An empirical formula was obtained through kinetic analysis and this formula can be used to predict the oxidative degree of the surface at different aging temperature. (C) 2011 Elsevier Ltd. All rights reserved.
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页码：1179 / 1186
页数：8
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