烯烃聚合用耐热型(α-二亚胺)镍催化剂的进展  

Progress in thermal-stable(α-diimine) nickel catalyst for olefin polymerization

作　　者：臧丹丹 何峰 范志强[1] 傅智盛[1] 

机构地区：[1]高分子合成与功能构造教育部重点实验室、浙江大学高分子科学与工程学系,浙江省杭州市310027

出　　处：《合成树脂及塑料》2015年第2期71-74,共4页China Synthetic Resin and Plastics

基　　金：国家重点基础研究发展规划项目(2011CB606 001);浙江省公益技术研究工业项目(2012C21056)

摘　　要：(α-二亚胺)镍催化剂可以高效地催化乙烯聚合得到高相对分子质量及不同拓扑结构的聚乙烯,但其耐热性能差,在温度不高于60.0℃时会迅速分解,而且随着聚合温度的升高,聚乙烯的相对分子质量通常会下降,限制了该催化剂在工业生产中的应用。通过对与N相连的苯环或者α-二亚胺的骨架结构进行修饰,制备了一系列耐热型(α-二亚胺)镍催化剂。(α-二亚胺)镍催化剂的热稳定性不仅受苯环上取代基及α-二亚胺骨架位阻的影响,也与金属中心周围的空间结构有关。A series of polyethylene with high relative molecular mass and different topology structures were produced with high-efficiency（α-diimine）nickel catalyst,however,the catalyst was decomposed quickly at a temperature of less than 60.0 ℃ for its poor thermal stability. The relative molecular mass of the resultant polyethylene would decrease with the increase of the polymerization temperature,which limited the application of the catalyst in industrial production. A series of（α-diimine）nickel catalysts were prepared by modifying the benzene ring connected with the N atom or the skeletal structure of α-diimine. The thermal stability of α-diimine nickel catalyst was affected not only by the substituent groups on the benzene but the spatial structure around the metal center as well.

关 键 词：烯烃聚合 镍催化剂 Α-二亚胺 支化度 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]