采用双四氢糠丙烷/四氢呋喃复合调节体系合成苯乙烯-丁二烯-异戊二烯嵌段共聚物  

Synthesis of Styrene-Butadiene-Isoprene Block Copolymers with Ditetrahydrofurylpropane/Tetrahydrofuran Complex Regulation System

作　　者：赵帅[1] 韩丙勇[1] 

机构地区：[1]北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室,北京100029

出　　处：《高分子材料科学与工程》2015年第6期7-12,共6页Polymer Materials Science & Engineering

摘　　要：采用双四氢糠丙烷(DTHFP)/四氢呋喃(THF)二元调节体系作为结构调节剂阴离子法制备了苯乙烯-丁二烯-异戊二烯嵌段共聚物,研究了其选择性加氢产物的性能。DTHFP/THF复合调节体系比THF单独调节活性更高,3,4-PI含量较低,调节效果更为理想。以环己烷为溶剂,采用三段或者两段加料法,双四氢糠丙烷和丁基锂的摩尔比为n(DTHFP)/n(Li)=0.25,THF和丁基锂摩尔比为n(THF)/n(Li)=4.2,合成了苯乙烯-氢化(丁二烯/异戊二烯)嵌段共聚物(EPEBS)和苯乙烯-氢化异戊二烯共聚物(SEP),对其性能进行比较后发现软段中含有2种聚合物单元的EPEBS更适合作为增稠剂用胶凝剂。Ditetrahydrofurylpropane(DTHFP)/tetrahydrofuran(THF)was used as complex regulation system in preparing styrene-isoprene block copolymers and styrene-butadiene-isoprene block copolymers,and performance of their selective hydrogenation products was studied.The results show that,the contents of 3,4-PI prepared with the DTHFP/THF binary regulation system is higher than that prepared with single regulator THF,however,the reactivity of the former is higher than that of the latter.Cyclohexane as solvent,two or three-stage method of addition,the mole ratio of 2,2-di(2-tetrahydrofuryl)propane and n-butyllithium(n(DTHFP)/n(Li)is 0.25,and the mole ratio of THF and n-butyllithium(n(THF)/n(Li))is 4.2,synthesized styrene-hydrogenated(butadiene/isoprene)block copolymers(EPEBS)and styrene-hydrogenated isoprene block copolymers(SEP).By comparing performance of SEP and EPEBS,soft segments containing two polymer-units are more suitable than EPEBS used as gelling agents for thickeners.

关 键 词：阴离子聚合 结构调节剂 嵌段共聚物 双四氢糠丙烷 

分 类 号：TQ317[化学工程—高聚物工业]