摘要
以苯乙烯、丁二烯为单体，ｓ－ＢｕＬｉ为引发剂，环己烷为溶剂，烷氧基硅烷为偶联剂，通过负离子聚合和偶合反应，再经化学处理而制得了具有星形嵌段结构的两个牌号丁苯透明抗冲树脂ＬｙＢＤＳ－０１，ＬｙＢＤＳ－０３。试验考察了聚合温度对反应速率的影响，单体配比、共聚物结构与树脂性能的关系。测试结果表明，ＬｙＢＤＳ－０３的伸长率约为ＬｙＢＤＳ－０１的１０倍，冲击强度约大１倍，硬度小于ＬｙＢＤＳ－０１。两个牌号树脂的形态均呈两相结构，聚丁二烯部分微观结构相似，其含量分别为顺式－１，４约为２３％，反式－１，４约为６８％，乙烯基约为９％；ＬｙＢＤＳ－０１和ＬｙＢＤＳ－０３的分子量分散指数分别为１．３２～１．４５和１．４９～１．７８。
A star-type block copolymer,styrene butadiene transparent impact resin was prepared with styrene and butadiene as monomers,s-BuLi as initiator,alkoxyl silane as coupling agent and cyclohexane as solvent by anionic polymerization and coupling reaction, and then by chemical treatment.The relationships among copolymer,structure, monomer ratio and the properties of resin,and the effect of polymerization temperature on reaction rate were investigated.Two grades of product,LyBDS-01and LyBDS-03 were synthesized with different structures and monomer ratios,LyBDS-03 had greater elongation and impact strength and LyBDS-01 had greater hardness.The results showed that these two grades were two-phase structure, the microstructure in butadiene part were similar,the cis-1,4 content was about 23%, trans-1,4 content about 68% and vinyl content about 9%.The molecular weight distribution indexes of LyBDS-01 and LyBDS-03 were 1.32～1.45 and1.49～1.78 respectively.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1995年第5期279-282,共4页
China Synthetic Rubber Industry
关键词
苯乙烯
丁二烯
机械性能
共聚
丁苯树脂
LyBDS
styrene
butadiene
styrene butadiene transparent impact resin
anionic polymerization
mechanical property
optical property
