Photo- and thermo-oxidative degradation of photocrosslinked ethylene-propylene-diene terpolymer

被引：52
作者：
Wang, WZ
Qu, BJ [1 ]
机构：
[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, Dept Polymer Sci & Engn, Hefei 230026, Anhui, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2003年 / 81卷 / 03期
基金：
中国国家自然科学基金;
关键词：
photo-oxidation; thermo-oxidation; degradation; photocrosslinking; EPDM;
D O I：
10.1016/S0141-3910(03)00154-X
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Photocrosslinking of ethylene-propylene-diene terpolymer (EPDM), and photo- and thermo-oxidative degradation of photo-crosslinked EPDM have been studied by photoacoustic Fourier transform infrared spectroscopy (PAS-FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The relative ratios of degradation to crosslinking for photo-crosslinked EPDM by swelling measurement were estimated by Charlesby's random crosslinking theory to be 0.06 for EPDM 4770 and 0.1 for EPDM 4045. The PAS-FTIR and XPS data gave the evidence that the surface photo- and thermo-oxidation degradation of photocrosslinked EPDM samples with a given UV irradiation time apparently increase with aging time. The main photooxidation products were identified as hydroperoxides and various carbonyl compounds. The SEM measurements show that the photo-oxidative degradation of photocrosslinked EPDM has a crucial effect compared with thermo-oxidative degradation. (C) 2003 Elsevier Ltd. All rights reserved.
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收藏
页码：531 / 537
页数：7
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