结构调节剂对液体聚异戊二烯橡胶结构的影响  

Effect of Structural Modifiers on Structure of LIR

作　　者：陈晓丽 苏忠魁 马松凯 CHEN Xiaoli;SU Zhongkui;MA Songkai(Technology R ＆ D Center of Shandong Yuhuang Chemical（Group）Co.,Ltd,Dongming 274512,China)

机构地区：[1]山东玉皇化工有限公司技术研发中心,山东东明274512

出　　处：《橡胶工业》2018年第11期1257-1260,共4页China Rubber Industry

摘　　要：采用锂系阴离子聚合工艺合成液体聚异戊二烯橡胶(LIR),研究结构调节剂二硫化碳(CS_2)、二乙二醇二甲醚(2G)、四甲基乙二胺(TMEDA)、四氢呋喃(THF)和乙醚(Et_2O)对LIR分子结构的影响。结果表明:非极性调节剂CS_2对LIR中顺式1,4-结构摩尔分数的影响不大;极性结构调节剂2G,TMEDA,THF和Et_2O均可降低LIR中顺式1,4-结构的摩尔分数,其中,2G和TMEDA的调节作用较大,Et_2O的调节作用较小,THF的调节效果最好。The liquid isoprene rubber（LIR）was synthesized by lithium anion polymerization process,and the effect of structural modifiers such as carbon disulfide（CS2）,diethylene glycol dimethyl ether（2G）,tetramethylethylenediamine（TMEDA）,tetrahydrofuran（THF） and ether（Et2O） on the molecular structure of LIR was investigated. The results showed that,nonpolar structural modifier CS2 has little effect on the mole fraction of cis-1,4-structure in LIR. The polar structural modifiers such as 2G,TMEDA,THF and Et2O could reduce the mole fraction of cis-1,4-structure in LIR,among which the regulation effect of 2G and TMEDA was larger,the regulation effect of Et2O was smaller,and THF had the best regulation effect.

关 键 词：液体聚异戊二烯橡胶 结构调节剂 阴离子聚合 顺式1 4-结构 

分 类 号：TQ333.3[化学工程—橡胶工业] TQ330.387