摘要
根据塑料光导纤维芯材聚甲基丙烯酸甲酯的结构和耐热性的关系，从（甲基）丙烯酸酯系中，优选出合适的单体与甲基丙烯酸甲酯共聚，得到了几种二元和三元共聚物。用热重分析及差热分析实验方法，测试了几种共聚物的热氧降解温度（Ｔｄ）及玻璃化温度（Ｔｇ）。结果表明，分别以甲基丙烯酸环己酯、甲基丙烯酸为第Ⅱ共聚单体，以丙烯酸甲酯为第Ⅲ共聚单体，合成的三元共聚物，耐热性比均聚物有明显改善。以丙烯酸环己酯为第Ⅱ共聚单体，合成的二元共聚物的Ｔｄ有显著提高。
According to the relationship between the structure and heat resistance of polymethyl (meth)acrylate(PMMA), several monomers of methacrylate(MA) were selected to copolymerize with methyl methacrylate(MMA) separately in order to improve heat resistance of the core polymer of plastic optical fibers and yielded binary copolymer and ternary copolymer. The degradation temperature(Td) and glass transition temperature(Tg) of copolymer were determined by TG and DTA methods. The results showed that the heat resistance of ternary copolymer was improved a lot compared with homopolymer, using CHMA or MAA as the second monomer and MA as the third monomer. The Td of binary copolymer was increased obviously and Tg was decreased a little, using CHAA as the second monomer.
出处
《合成纤维工业》
CAS
CSCD
1999年第3期21-24,共4页
China Synthetic Fiber Industry
