溶液淤浆法合成高反式-1,4-异戊二烯-丁二烯共聚物  

Synthesis of Highly Trans-1,4-Poly(isoprene-co-butadiene)by Solution Slurry Polymerization

作　　者：张伟[1,2] 魏萌萌[1,2] 安雷[1,2] 李籽龙 仝艳芳 贺继东 ZHANG Wei;WEI Mengmeng;AN Lei;LI Zilong;TONG Yanfang;HE Jidong(Key Laboratory of Rubber-Plastics,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China;Shandong Provincial Key Laboratory of Rubber-Plastics,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042 [2]青岛科技大学山东省橡塑材料与工程重点实验室,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2020年第6期58-63,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：山东省自然科学基金青年基金项目(ZR2019QEM002).

摘　　要：以正己烷为溶剂,采用溶液淤浆聚合方法,用浸渍法制备的负载型Ziegler-Natta催化体系(TiCl_4/MgCl_2-Al(i-Bu)_3)合成高反式-1,4-异戊二烯-丁二烯共聚物(简称TIBR),通过调整丁二烯/异戊二烯(Bd/Ip)的投料比来控制TIBR的微观结构,考察了TIBR微观结构对于结晶和热性能的影响,结果表明:共聚物中丁二烯和异戊二烯结构单元均以反式-1,4-构型为主,含量均大于97%,同时分别含有少量的1,2-结构和3,4-结构;其中丁二烯结构单元结晶形成的晶型以formⅠ晶型为主,异戊二烯结构单元结晶形成的晶型以β晶型为主。随着Bd/Ip投料比的增加,共聚物玻璃化转变温度(T_g)从-66.3℃降低至-73.4℃,热稳定性随之增强。Highly trans-1,4-poly(isoprene-co-butadiene)was synthesized by solution slurry polymerization with the supported Ziegler-Natta catalyst(TiCl4/MgCl2-Al(i-Bu)3) byinfusion process inn-hexane. The effect of TIBR microstructure was controlled by adjusting the butadiene/isoprene(Bd/Ip) feed ratio, and the effects of TIBR microstructure on crystallization and thermal properties were investigated.The results showed: The butadiene and isoprene units in the copolymerswere mainly in the trans-1,4-configuration, and the content were more than 97%, and also contained a small amount of 1,2-structure and 3,4-structure respectively;among them, the crystals of the butadiene units were mainly crystalline form Ⅰ, the crystals of the isoprene units were mainly crystalline β. As the feed ratio of Bd/Ip increased, the monomer conversion rate decreased from 36.8% to 17.9%;the glass-transition temperature(Tg) decreased from-66.3 ℃ to-73.4 ℃,and the thermal stability increased.

关 键 词：聚烯烃 高反式-1 4-异戊二烯-丁二烯共聚物 溶液淤浆法 微观结构 

分 类 号：O063[理学]