论文部分内容阅读
本文讨论以三苯甲基六氯化锑为引发剂的氧化苯乙烯与氧化环己烯的阳离子共聚。共聚合反应是在本体聚合条件下进行的,其聚合反应温度分别为0℃,30℃和56℃。聚合产物经丙酮进行萃取,萃取前后聚合产物的核磁共振谱表明此聚合产物是真正的共聚物,而不是两种均聚物的混合体。单体竞聚率是用Kelen-Tudos和Fineman-Ross两种方法进行测定的,两种方法所得结果是一致的,它们是: 0℃: r_1(氧化环己烯)=4.34; r_2(氧化苯乙烯)=0.34; 30℃:r_1(氧化环己烯)=4.19; r_2(氧化苯乙烯)=0.42; 56℃:r_1(氧化环己烯)=3.94; r_2(氧化苯乙烯)=0.46。
This article discusses the cationic copolymerization of styrene oxide and cyclohexene oxide using trityl antimony hexachloride as an initiator. The copolymerization is carried out under bulk polymerization conditions and the polymerization temperature is 0 ° C, 30 ° C and 56 ° C, respectively. The polymerization product was extracted with acetone. The NMR spectra of the polymer before and after the extraction showed that the polymer was a true copolymer, rather than a mixture of two homopolymers. The monomer reactivity ratio was determined by the Kelen-Tudos and Fineman-Ross methods. The results obtained by the two methods are consistent and are: 0 ° C: r_1 (cyclohexene oxide) = 4.34; r_2 Ethylene = 0.34; 30 ° C: r_1 (cyclohexene oxide) = 4.19; r_2 (styrene oxide) = 0.42; 56 ° C: r_1 (cyclohexene oxide) = 3.94; r_2 (styrene oxide) = 0.46.