星型氢化无规共聚物HSSIBR的制备与表征  

Preparation and Characterization of Star-Shaped Hydrogenated HSSIBR

作　　者：赖林海[1,2] 李杨[1,2] 李嵬[1,2] 王玉荣[1,2] 

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：《化学工业与工程》2012年第4期6-10,共5页Chemical Industry and Engineering

基　　金：国家自然科学基金重点资助项目(21034001)

摘　　要：以二乙烯基苯(DVB)为偶联剂,环己烷为溶剂,通过阴离子聚合制备了星型苯乙烯-异戊二烯-丁二烯三元无规共聚物(SSIBR);以环烷酸镍和三异丁基铝为催化剂,在60℃和4.0 MPa氢压下反应4 h,制备了氢化度为100%氢化星型苯乙烯-异戊二烯-丁二烯三元无规共聚物(HSSIBR)。考查了DVB/Li用量、单臂相对分子质量对聚合物偶联效率(CE)和加氢反应的影响。采用1H-NMR、TGA、DSC、XRD对HSSIBR进行分析表征,并应用自制的HSSIBR作为润滑油黏度指数改进剂对其性能进行测试。结果表明,以DVB为偶联剂得到SSIBR偶联效率最高达到86.8%,单臂相对分子质量增加,偶联效率下降;HSSIBR比SSIBR的初始分解温度提高了55℃,耐热耐老化性得到了明显改善;HSSIBR作为润滑油黏度指数改进剂,其剪切稳定性得到改善,低温性能明显提高。The star-shaped styrene-isoprene-butadiene ternary random copolymer SSIBR was synthesized using the anionic polymerization method with diviuylbenzene（DVB） as coupling agent. The SSIBR was hydrogenated and HSSIBR was obtained with the nickel naphthenate（Ni）/triisobutyl aluminum（A1） cat- alyst system, while the temperature was 60 ℃, hydrogenated pressure was 4 MPa and the reaction time was 4 hours. The effect of molecular weight and DVB/Li content of SSIBR on coupling efficiency and the hydrogenation degree of SSIBR were investigated in details. In this work, 1H-NMR, TGA, DSC and XRD were used to evaluate the HSSIBR. Meanwhile, the HSSIBR was investigated as viscosity index im- provers in oil. It is proved that the coupling efficiency of SSIBR can reach 86.8% using DVB as coupling agent, the coupling efficiency declines with the increase of molecular weight; the initial decomposition temperature of HSSIBR raises 55 ~C compared with SSIBR and the heat resistance and the aging resist- ance are improved obviously; the shearing stability of HSSIBR as viscosity index improvers is improved and the low temperature performance increases significantly.

关 键 词：星型SIBR DVB偶联 氢化反应 黏度指数改进剂 

分 类 号：TQ314.2[化学工程—高聚物工业]