甲基丙烯酸酯
共聚物
高分子化学
光降解
反应性(心理学)
大小排阻色谱法
降级(电信)
材料科学
甲基丙烯酸甲酯
傅里叶变换红外光谱
凝胶渗透色谱法
化学
光化学
聚合物
化学工程
有机化学
催化作用
光催化
医学
电信
替代医学
病理
计算机科学
工程类
酶
作者
Oscar Chiantore,Massimo Lazzari,Mauro Aglietto,Valter Castelvetro,Francesco Ciardelli
标识
DOI:10.1016/s0141-3910(99)00146-9
摘要
The photochemical stability and photodegradation pathways of poly(2,2,2-trifluoroethyl methacrylate) (PTFEMA) and copolymers of 1H,1H,2H,2H-perfluorodecyl methacrylate with 2-ethylhexyl methacrylate (XFDMA–EHMA) have been investigated under artificial solar light irradiation. The extent of degradation was assessed by weight loss and gel content determination, size exclusion chromatography and FTIR spectroscopy. PTFEMA exposed up to 2000 h showed only molecular changes due to a low extent of chain scission. The two XFDMA–EHMA copolymers underwent much more degradation, with extensive cross-linking, formation of low-molecular weight products, and oxidation reactions on the chains. The behaviour of the copolymers is controlled by the reactivity of the EHMA units, as was shown by comparison with results obtained on degradation of PEHMA homopolymer.
科研通智能强力驱动
Strongly Powered by AbleSci AI