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以NdCl3.4L(配体L为膦酸三丁酯TBP、膦酸三苯酯TPP、膦酸二异辛酯P204)为主催化剂(简称[Nd])、甲基铝氧烷(MAO,简称[Al])为助催化剂和环己烷为溶剂,进行1,3-丁二烯聚合的研究.考察了配体对丁二烯聚合反应活性的规律及MAO用量、催化剂陈化时间、溶剂种类对聚合的影响;并对聚合物进行NMR,IR和GPC的表征.结果表明,3种配体的聚合活性顺序为TBP>P204>TPP;当[Al]/[Nd]为30时,聚合物的分子量分布指数达到1.20;30℃陈化时,聚丁二烯cis-1,4结构均大于97%;与正己烷、甲苯溶剂对比来看,环己烷体系所得聚合产物的分子量分布相对较窄、产率较高.
NdCl3.4L (ligand L is tributyl phosphonate TBP, triphenyl phosphonate TPP, diisooctyl phosphonate P204) as the main catalyst (referred to as [Nd]), methylaluminoxane (MAO, referred to as [Al]) as cocatalyst and cyclohexane as solvent, the polymerization of 1,3-butadiene was investigated.The activity of the ligand for butadiene polymerization and the amount of MAO, catalyst aging time, solvent type The results showed that the polymerization order of the three ligands was TBP> P204> TPP. When [Al] / [Nd] was 30, the polymerization of polymer Molecular weight distribution index reached 1.20; at 30 ℃ aging, the cis-1,4 structure of polybutadiene was greater than 97%; compared with n-hexane and toluene solvent, the molecular weight distribution of cyclohexane polymerization system was relatively Narrow, higher yield.