多核Nd－Al双金属配合物对共轭双烯烃的聚合Ⅲ．溶剂等因素的影响  

Conjugated Diene Polymerization Catalyzed by Polynuclear Nd-Al Bimetallic ComplexⅢ.Influences of Solvent and Other Factors

作　　者：董为民[1] 杨继华[1] 逄束芬[1] 黄葆同[1] 

机构地区：[1]中国科学院长春应用化学研究所

出　　处：《应用化学》1995年第1期1-4,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目

摘　　要：报道了多核Ｎｄ－Ａｌ双金属配合物活性体对共轭双烯烃的溶液聚合。结果表明，适宜的振荡时间有利于提高活性体的催比活性；通过外加ＡｌＥｔ＿３，验证了聚合体系的纯度和活性体的稳定性，溶剂类型对活性体催比活性和聚合物分子量影响较大，活性次序为甲苯≥环己烷＞正己烷；对产物［η］的影响则相反：甲苯＜＜环己烷＜正己烷．不同单体的定向聚合性能有差别，聚丁二烯的顺１，４含量较低，且易受反应条件的影响．Conjugated diene solution polymerization catalyzed by polynuclear ND-Al bimetal-lic complex was further studied.Results indicate that the activity of the active species wasimporved by appropriate sliaking time.The purity of the polymerization system and the sta-bility of the active species were examined by additional AlEt_3.The type of solvent had obvi-ously influence on the activity of the active species and the molecular weight of polymers ob-tained,the order of activity being toluene≥cyclohexane>n-hexane,and conversely,the or-der of[η]being toluene<<cyclohexane <n-hexane. Difference monomers had different fea-tures of stereospecific polymerization;cis-1,4 microstructure content of polybutadiene waslower and varied more obviously with the experimental conditions than that of polyisoprene.The results aid in deepgoing understanding of the stereospecific polymerization initiated byrare earthcatalyst.

关 键 词：共轭双烯烃 聚合 多核 钕-铝配合物 催化性能 

分 类 号：O623.122[理学—有机化学] O631.5[理学—化学]