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本文比较了三个系列的含氮配位体对FeCl_3-(i-C_4H_9)_3Al体系催化丁二烯聚合及对聚合物微观结构的影响:ⅰ)吡啶、喹啉、2,2′-联吡啶、邻啡啰啉、2,2′,2″-三联吡啶、2,2′,2″,2″′-四联吡啶;ⅱ)吡啶、2-氰基吡啶、2,6-二氰基吡啶;ⅲ)三乙胺、N,N,N′,N′-四甲基乙二胺、二乙撑三胺。考察了配位体用量及烷基铝用量对聚合反应及聚合物特性粘数的影响,同时观察到聚合物的1,2-结构随配位体的配位齿数的增加而增加,这是由于配位体占据活性中心上的空轨道,使丁二烯在活性中心上单配位几率增加所致。用这一机理亦解释了各配位体之间聚合活性的差别。
The effects of three series of nitrogen-containing ligands on the polymerization of butadiene and on the microstructure of the polymer catalyzed by FeCl_3- (i-C_4H_9) _3Al were compared: i) pyridine, quinoline and 2,2’-bipyridine , 2’-dipyridyl, 2, 2 ’, 2 “, 2”’ - tetrapyridine; ii) pyridine, 2-cyanopyridine, Pyridine, iii) Triethylamine, N, N, N ’, N’-tetramethylethylenediamine and diethylenetriamine were used to investigate the effects of the amount of ligand and aluminum alkyl on the polymerization and polymer intrinsic viscosity While it is observed that the 1,2-structure of the polymer increases with the increase of coordination number of the ligand because the ligand occupies the empty orbit on the active center, so that butadiene in the active center The probability of a single coordination increase is also explained by this mechanism which also explains the difference in polymerization activity between the various ligands.