窄分布液体聚丁二烯的聚合动力学及加氢效果  

Polymerization Kinetics of Narrow Distribution Liquid Polybutadiene and Its Hydrogenation

作　　者：高阳峰[1,2] 李杨[1,2] 张春庆 王艳色 王玉荣 

机构地区：[1]大连理工大学化工学院高分子材料系精细化工国家重点实验室,辽宁大连116024 [2]辽宁省高分子科学与工程重点实验室,辽宁大连116024

出　　处：《石油化工》2012年第11期1272-1276,共5页Petrochemical Technology

基　　金：国家自然科学基金重点项目(21034001)

摘　　要：以环己烷为溶剂、高浓度正丁基锂(n-BuLi)为引发剂,采用阴离子聚合法合成了不同低相对分子质量液体聚丁二烯。考察了聚合温度和引发剂浓度对丁二烯聚合动力学的影响。采用GPC技术测定试样的相对分子质量及其分布;采用1HNMR技术测定试样的加氢度。实验结果表明,单体浓度对液体聚丁二烯聚合的反应速率呈一级关系,求得不同条件下假一级表观增长速率常数,得到表观增长活化能为112 kJ/mol,指数前因子为3.67×1019L/(mol.min);在聚合温度为313 K条件下,得到窄分布液体聚丁烯的聚合动力学方程;相对分子质量为1 000～3 000的窄分布液体聚丁二烯加氢后,加氢度均达到100%。Liquid polybutadiene with low relative molecular mass was synthesized by anionic polymerization with cyclohexane as a solvent and high concentration n-butyl-lithium as an initiator. The effects of the polymerization temperature and initiator concentration on the polymerization kinetics were investigated. The liquid polybutadiene was characterized by means of GPC and 1H NMR. The results show that the butadiene polymerization is first order reaction. The pseudo-first apparent rate constants under different conditions are obtained, the apparent activation energy is 112 kJ/mol and the frequency factor is 3.67 × 10^19 L/（mol·min）. The polymerization kinetic equation of the narrow distribution liquid polybutadiene at temperature 313 K was attained. The liquid polybutadiene with the relative molecular mass range of 1 000-3 000 were hydrogenated and the hydrogenation degree could reach 100%.

关 键 词：阴离子聚合 液体聚丁二烯 丁二烯聚合动力学 加氢 

分 类 号：TQ311.44[化学工程—高聚物工业]