N－烯丙基咔唑与甲基丙烯酸甲酯高温共聚合

THERMAL COPOLYMERIZATION OF N-ALLYLCARBAZOLE WITH METHYL METHACRYLATE AT HIGH TEMPERATURE

Ｎ－烯丙基咔唑不能均聚合，但可与甲基丙烯酸甲酯在高温下共聚合。测定了２００—２６０℃时两单体共聚合竞聚率，１度为２５０℃时，ｒ１和ｒ２均小于１。共聚物分子量随着共聚温度升高而降低．结果表明，共聚体系中，增长反应与降解反应同时存在．该反应可能是自由基过程．

-Allylcarbazole has not been homopolymerized but copolymerind withmethyl methaCrylate at high temperature. The reactivity ratios of the tWomonomers in copolymerization at temperature range of 200 - 260 t has been es timated, and both r1 and r2 were less than unity at the tffoperature of 250 t.The average molecular weights of the resulting copolymers decreased with theincreasing temperature in copolymerizahon. The results obtained here showed thatboth propagation and degradation existed in the copolymerization system and suggested a possible radical proceeding for copolymerization of N -- allylcarbazole withmethyll methacrylate at high temperature.