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合成并表征了一系列带有[2-(4,5-二苯基-2-咪唑基)-1-苯亚胺基]苯酚配体([N^N^O]三齿配体)的二氯化钴配合物(1~4),并研究了这些配合物对丁二烯溶液聚合的催化性能.研究结果表明,助催化剂的种类对丁二烯聚合的催化活性和产物性能有显著的影响,倍半乙基氯化铝(EASC)为最佳的助催化剂.在EASC的活化作用下,该催化体系引发丁二烯单体聚合,15 min内丁二烯单体的转化率可达92.7%,产物聚丁二烯中顺式1,4-结构的含量高达97.4%.并详细研究了助催化剂的用量、聚合的温度、配体上不同取代基等对丁二烯聚合行为的影响,包括丁二烯单体的转化率、产物聚丁二烯的分子量与分子量分布及微观结构.通过凝胶渗透色谱法(GPC)对聚合产物的分子量及分子量分布进行了表征,核磁共振氢谱(1H-NMR)和碳谱(13CNMR)分析结果表明所得聚合物具有高的顺式1,4-结构含量(97%左右).
A series of complexes of [2- (4,5-diphenyl-2-imidazolyl) -1-phenylimino] phenol ligands [[N ^ N ^ O] tridentate ligands were synthesized and characterized (1 ~ 4), and the catalytic performance of these complexes on butadiene solution polymerization was studied.The results show that the catalytic activity and product properties of the cocatalysts for butadiene polymerization are significant (EASC) as the best cocatalyst.Under the activation of EASC, the catalyst system initiated the polymerization of butadiene monomer and the conversion of butadiene monomer reached within 15 min 92.7%, and the content of cis 1,4-structure in the product polybutadiene was as high as 97.4% .The effect of the amount of cocatalyst, the temperature of polymerization and the different substituents on the polymerization of butadiene , Including the conversion of butadiene monomer, molecular weight and molecular weight distribution and microstructure of the product polybutadiene.The molecular weight and molecular weight distribution of the polymerization product were characterized by gel permeation chromatography (GPC) The results of 1H-NMR and 13CNMR indicated that the obtained polymer had high cis-1,4-content (about 97%).