Branched α-olefin, 4-methyl-1-pentene (4 MP), was polymerized with classical α-diimine nickel complexes in the presence of MAO. Influences of structure of α-diimine nickel catalysts and polymerization parameters including temperature and [Al]/[Ni] mole ratio were evaluated. At 0 °C, 4-methyl-1-pentene can be polymerized in a living/controlled manner. The obtained poly(4-methyl-1-pentene)s are amorphous elastomers with low glass transition temperature (T_g). Nuclear magnetic resonance (NMR) and distortionless enhancement by polarization transfer (DEPT) analyses show that various types of branches and microstructural units are present in the polymers. On the basis of assignment of microstructures, mechanistic models that involves the 1,2- and 2,1-insertion, and chain walking were constructed. The influences of temperature and [Al]/[Ni] mole ratio on branching degree, branch type, and insertion pathways were also discussed in detail.

在MAO存在下，将支链α-烯烃4-甲基-1-戊烯（4 MP）与经典的α-二亚胺镍配合物聚合。评价了α-二亚胺镍催化剂的结构和温度，[Al] / [Ni]摩尔比等聚合参数的影响。在0°C，4-甲基-1-戊烯可以活性/受控方式聚合。所得的聚（4-甲基-1-戊烯）是具有低玻璃化转变温度（T _g）。核磁共振（NMR）和极化转移无畸变增强（DEPT）分析表明，聚合物中存在各种类型的分支和微结构单元。在分配微结构的基础上，构造了涉及1,2和2,1插入以及链行走的机械模型。还详细讨论了温度和[Al] / [Ni]摩尔比对支化度，支化类型和插入途径的影响。