不同单体质量比合成TBIR的结构与性能  

Structure and properties of trans-1,4-butadiene-isoprene copolymerized rubber with different monomer mass ratios

作　　者：崔虹虹 宗鑫 高波 李丹丹 郝福兰 李兰阁 郑红兵 CUI Honghong;ZONG Xin;GAO Bo;LI Dandan;HAO Fulan;LI Lange;ZHENG Hongbing(Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization,Qingdao 266042,China;Shandong Huaju Polymer Material Co.,Ltd.,Binzhou 256500,China;Chambroad Chemical Industry Research Institute Co.,Ltd.,Binzhou 256500,China;Shandong Chambroad Sinopoly New Material Co.,Ltd.,Binzhou 256500,China)

机构地区：[1]山东省烯烃催化与聚合重点实验室,山东滨州256500 [2]山东省华聚高分子材料有限公司,山东滨州256500 [3]黄河三角洲京博化工研究院有限公司,山东滨州256500 [4]山东京博中聚新材料有限公司,山东滨州256500

出　　处：《弹性体》2023年第2期31-36,共6页China Elastomerics

基　　金：山东省重大科技创新工程项目(2021CXGC010901);泰山学者工程资助项目。

摘　　要：研究了不同单体比例反式-1,4-丁二烯-异戊二烯共聚橡胶(TBIR)的结构及性能。结果表明,采用溶液聚合方法合成TBIR,在控制转化率保持一致的条件下,随着丁二烯/异戊二烯(Bd/Ip)单体质量比增加,其聚合催化效率逐渐增大;Bd和Ip结构单元均以反式-1,4-结构(>95%)为主,产物中Ip反式-1,4结构含量略有降低,Ip链段长度减小,Bd反式-1,4含量逐渐增加;随着Bd单体质量增加,玻璃化转变温度降低,结晶能力逐渐下降,TBIR为具有一定结晶性的无规共聚物;数均相对分子质量逐渐增加,相对分子质量分布变宽。当Bd/Ip单体质量比为10/100时,与纯天然橡胶(NR)相比,10份TBIR替代NR,硫化胶耐磨耗性能提高了11%;Bd/Ip单体质量比为2/100时,Ip反式-1,4结构摩尔分数最高达到96%以上,1,4-反式聚异戊二烯(TPI)链段较长,10份TBIR替代NR,硫化胶具有优异的物理机械性能,耐屈挠疲劳寿命提高了81%。The structure and properties of trans-1,4-butadiene-isoprene copolymerized rubber(TBIR)with different monomer properties were studied.The results showed that the conversion rate increased with the increase of Bd/Ip ratio.TBIR were synthesized by solution polymerization under the condition of the same polymerization efficiency.Both Bd and Ip structural units were mainly composed of trans-1,4-structure(>95%).The content of Ip trans-1,4 structure decreased slightly,the length of Ip chain segment decreased,and the content of Bd trans-1,4 gradually increased.The glass transition temperature and crystallization capacity decreased,TBIR is a random copolymer with crystallinitywith M n increased and M w/M n widened gradually.Wear resistance got better with the increase of Bd content,and the Bd/IP mass ratio was 10/100.When 10 parts TBIR replaced natural rubber(NR),the wear resistance increased by 11%compared with pure NR.When the mass ratio of Bd/Ip was 2/100,Ip trans-1,4 structure mass fraction reached more than 96%,and TPI chain segment was longer.When 10 phr TBIR replaced NR,vulcanization had excellent mechanical properties,and flexure fatigue life increased by 81%.

关 键 词：反式-1 4-丁二烯-异戊二烯共聚橡胶 共聚物组成 结晶性能 耐疲劳性能 

分 类 号：TQ333.99[化学工程—橡胶工业]