双溴封端三氟氯乙烯调聚物的研制

摘要

选择二溴四氟乙烷为调聚剂，以三氟氯乙烯为调聚单体，尝试了3种不同方法试图合成双溴封端的三氟氯乙烯均聚调聚物，通过实验比较了3种方法的优缺点，同时通过凝胶渗透色谱、元素分析以及核磁共振等手段对调聚物的分子量、端基类型及其结构形式进行了表征。结果表明本文的合成方法简单易行，可以合成不同分子量的双溴封端调聚物。%Double bromine end - trifluorochloroethylene was synthesized using 1, 2 - dibromo - 1, 1, 2, 2 - tetrafluoroethane as telomer and trifluorochloroethylene as monomer by three methods. Gel - permeation chromato- graph, element analysis and nuclear magnetic resonance were used to characterize the molecular weight, sort of ter- minal group and structure of the telomer. Results showed that the adopted methods were not only simple and practi- cable, but could synthesize double bromine ended telomer with different molecular weight.