三齿配位钛配合物催化烯烃聚合

发布时间：2019-01-27 08:36

【摘要】：钛基聚烯烃催化剂不仅满足了价廉和性质优良的聚烯烃生产,而且有望进一步提升聚烯烃品质和发展新型聚烯烃树脂,因而结构可控钛配合物催化剂设计合成与催化性能提升是聚烯烃研究的核心课题之一。在茂金属催化剂之外,多齿配体的钛配合物成为研究的热点,其中,三齿配体良好地稳定了钛配合物。与此同时,配位原子的多样化极大地丰富了配合物合成与催化活性调控,在控制聚合活性的同时改善了所得聚合物的微观结构和宏观性能。本综述集中讨论了近年来在烯烃聚合催化体系中三齿配位钛配合物新研究的进展,讨论了取代基对于配合物中电子效应和立体效应的影响,以及配合物结构变化对于烯烃聚合活性及所得聚合物性能的影响关系,相关结果有助于指导钛配合物设计合成和催化聚合规律的研究。
[Abstract]:Titanium based polyolefin catalysts not only meet the requirements of low cost and excellent properties of polyolefin production, but also promise to further improve the quality of polyolefin and develop new polyolefin resins. Therefore, the design, synthesis and improvement of catalytic performance of the structure controllable titanium complex catalyst is one of the core topics in the study of polyolefin. In addition to metallocene catalysts, the titanium complexes of polydentate ligands have become a hot research topic, among which the tridentate ligands have stabilized the titanium complexes well. At the same time, the diversity of coordination atoms greatly enriched the synthesis and catalytic activity regulation of the complexes, and improved the microstructure and macroscopic properties of the obtained polymers while controlling the polymerization activity. This review focused on the recent advances in the study of tridentate coordination titanium complexes in olefin polymerization catalytic systems, and discussed the effects of substituents on the electronic and stereoscopic effects of the complexes. The influence of the structure of the complexes on the activity of olefin polymerization and the properties of the resulting polymers is also discussed. The results are helpful for the study of the design, synthesis and catalytic polymerization of titanium complexes.
【作者单位】：山西大学应用化学研究所;山西大学化学化工学院;中国科学院化学研究所工程塑料重点实验室;
【基金】：国家自然科学基金项目(No.21101101,U1362204) 山西大学大型科学仪器中心资助~~
【分类号】：O631.5

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