星型嵌段共聚丁苯抗冲透明树脂的合成

Synthesis of a star type block butadiene styrene copolymerization resin with impact and transparent behavior by n-butyl lithium initiator

研究了以丁基锂为引发剂 ,在环己烷溶剂中合成抗冲及透明性颇佳的星型丁二烯 -苯乙烯共聚嵌段树脂(简称为ITPS)主要的影响因素。结果表明以正丁基锂为引发剂制备的ITPS透明性好 ;偶合剂用甲基三甲氧基硅烷可以达到偶合效率、力学性能及透明性三者兼顾 ;m(丁二烯 ) /m(苯乙烯 ) =2 0 /80所合成ITPS的各项性能最佳 ;四氢呋喃的加入使聚丁二烯分子链段中的反 1,4-结构明显减少 ,1,2 -结构增加 ,且ITPS的弯曲强度与其用量成正比 ;后处理方式和组合防老剂可以分别使ITPS透光率提高 16.6%及 11.1%

The influence of t butyl and n butyl lithium initiator,butadiene and styrene ratio,coupler,butylenes oxide,mixed protective agent and fine treat on synthesis of star type block butadiene styrene copolymerization resin with transparent and impact(abbreviation as ITPS) were discussed.The result shows that the transparent of ITPS was fairly good by n butyl lithium initiator;the best balance on couple rate,mechanics and transparent of ITPS was achieved by methyl trimethoxysilicone coupler;ITPS properties were optimum that butadiene and styrene ratio equals 20/80;the effect of butylenes oxide were remarkable on tran 1,4 and vinyl structure of polybutadiene.Besides,16.6% and 11.1% transparent of ITPS were increased respectively by fine treatment and mixed protective agent. [WT5HZ]