摘要
采用负离子溶液聚合法,以仲丁基锂为引发剂、环己烷为溶剂、四氢呋喃为结构调节剂,以及1,1-双(4-二甲基氨基苯基)乙烯为官能化共聚单体与丁二烯和苯乙烯进行活性负离子共聚合,制备了二甲氨基链中多官能化丁二烯-苯乙烯共聚物,考察了聚合温度和结构调节剂用量对聚合动力学和聚合物微观结构的影响。结果表明,共聚物链中二甲氨基官能团数量可通过调整聚合温度和结构调节剂用量进行准确控制,随聚合温度升高和四氢呋喃用量的增加,单体的总反应速率和转化率都逐渐增大;聚合物中1,2-结构的含量随结构调节剂用量的增加而逐渐增大,随聚合温度升高而逐渐减小。求得聚合温度为50℃时丁二烯和苯乙烯单体的平均竞聚率为69.67。
In chain multi-functionalized buta-diene-styrene copolymers with dimethylamino groups were prepared by anionic solution polymerization with butadiene and styrene using s-butyl lithium as initiator,cyclohexane as solvent,tetrahydrofuran as structure regulator and 1,1-bis(4-dimethylaminophenyl)ethylene as functional copolyme-rization monomer.The effects of polymerization temperature and amount of structure regulator on polymerization kinetics and microstructure of the copolymer were investigated.The results showed that the number of dimethylamino functional groups in the copolymer chain could be accurately controlled by adjusting polymerization temperature and amount of structural regulator.With the increase of polymerization temperature and amount of tetrahydrofuran,the total polymerization rate and conversion of monomers increased gradually.The content of 1,2-unit increased with increase of the amount of structure regulator and decreased with increase of polymerization temperature.The average reactivity ratio of butadiene and styrene was 69.67 at polymerization temperature 50℃.
作者
史工昌
杨明辉
董静
钟启林
张华强
SHI Gong-chang;YANG Ming-hui;DONG Jing;ZHONG Qi-lin;ZHANG Hua-qiang(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou 730060,China;Southwest Chemical Sales Company,PetroChina,Chengdu 610036,China)
出处
《合成橡胶工业》
CAS
北大核心
2021年第1期42-46,共5页
China Synthetic Rubber Industry
关键词
溶聚丁苯橡胶
1
1-双(4-二甲基氨基苯基)乙烯
活性负离子聚合
链中多官能化
聚合动力学
微观结构
solution polymerized styrene-butadiene rubber
1,1-bis(4-dimethylaminophenyl) ethylene
living anionic copolymerization
in chain multi functionalization
reaction kinetics
microstructure
