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本文较详细考察了用环烷酸钕-氧化二异丁基铝-氯化二异丁基铝催化体系进行丁二烯聚合时,各 种聚合条件对聚合物的微观结构及分子量的影响。提出了聚合物的活性链末端为π-烯丙基钕氯化物结构,并由于其异构化而决定聚合物微观结构的假设。首次用稀土催化体系合成出特性粘数为3.0—3.5,无凝胶,顺-1,4链节含量达99％的聚丁二稀。
In this paper, the effects of various polymerization conditions on the microstructure and molecular weight of the polymers were investigated in more detail when using neodymium naphthenate-diisobutylaluminum-diisobutylaluminum chloride catalyst system for butadiene polymerization. The hypothesis that the active chain end of the polymer is a π-allyl neodymium chloride structure and determines the microstructure of the polymer due to its isomerization is proposed. For the first time, a rare earth catalyst system was used to synthesize polybutadiene thin films with an intrinsic viscosity of 3.0-3.5, no gels and 99% cis-1,4 linkages.