无规聚1-丁烯及聚乙烯-聚1-丁烯两嵌段共聚物的合成与表征  

Synthesis and characterization of atactic poly(1-butene) and polyethylene-poly(1-butene) block copolymer

作　　者：刘诚[1] 李杨[1] 韩冰[1] 李嵬[1] 张春庆[1] 王玉荣[1] 

机构地区：[1]大连理工大学化工学院精细化工国家重点实验室,辽宁大连116012

出　　处：《合成橡胶工业》2011年第3期181-185,共5页China Synthetic Rubber Industry

基　　金：国家"八六三"计划资助项目(2007AA03Z532);国家自然科学基金资助项目(20874008)

摘　　要：通过一步或分步添加极性调节剂二哌啶乙烷,采用负离子聚合技术合成了1,2-结构质量分数大于98.5%的聚丁二烯及不同嵌段比的低乙烯基-高乙烯基嵌段聚丁二烯,然后使用镍系催化剂对其进行加氢反应,合成了无规聚1-丁烯和聚乙烯-聚1-丁烯两嵌段共聚物,并对聚合物进行了表征。结果表明,无规聚1-丁烯的无规化程度很高,玻璃化转变温度(Tg)为-24.5^-22.7℃;两嵌段共聚物在低温区出现了聚1-丁烯的Tg,而在高温区则出现了聚乙烯的熔融吸热峰,且随着聚乙烯嵌段含量的增加,Tg值略有升高,结晶度增大。Through polar modifier dipiperidinoethane in modes of one-step and two-step adding,the polybutadiene with mass fraction of 1,2-structure of 98.5% and the stereoblock polybutadiene with different block ratios were obtained by anionic polymerization respectively.And the two kinds of polybutadiene were hydrogenated by nickel catalyst to synthesize atactic poly（1-butene） and polyethylene-poly（1-butene） block copolymer,and the polymers were characterized.The results showed that the atactic poly（1-butene） had high stereoirregularity and its glass transition temperature（Tg）was-24.5——22.7 ℃.The polyethylene-poly（1-butene） block copolymer had Tg of poly（1-butene） at low temperature region and a melting endothermic peak of polyethylene at high temperature region,and the Tg and crystallinity increased with increasing the content of polyethylene block.

关 键 词：负离子聚合 二哌啶乙烷 1 2-聚丁二烯 嵌段聚丁二烯 加氢反应 无规聚1-丁烯 聚乙烯-聚1-丁烯嵌段共聚物 

分 类 号：TQ316.3[化学工程—高聚物工业]