This paper reports the polymerization of 1-octadecene catalyzed by a series of α-diimine Ni(II) complex, with methyl ligand backbone and different substituents in the ortho and para aryl positions, in combination with Et₂AlCl. We obtained semicrystalline ethylene–propylene–1-octadecene terpolymers with high molecular weight and narrow molecular weight distribution. The formation of such terpolymers is due to the numerous combinations of insertion and chain-walking pathways. The effect of the type of ligand and monomer feedstock concentration on the activity, regioselectivity, polymers (micro)structure, and structure/properties is thoroughly investigated by NMR, DSC, WAXD and SAXS. The thermal behavior and the crystal structure of the polymers are strongly influenced by the level of incorporation of methyl and longer alkyl branches. The chain heterogeneity of the polymers is investigated by successive self-nucleation and annealing thermal fractionation evaluating the crystallizable sequence length, and the lamellar thickness.

本文报道了由一系列α-二亚胺Ni（II）配合物催化的1-十八碳烯的聚合反应，该配合物具有甲基配体主链和邻位和对芳基位置的不同取代基，并与Et ₂结合氯化铝 我们获得了具有高分子量和窄分子量分布的半结晶乙烯－丙烯－1-十八碳三元共聚物。这种三元共聚物的形成归因于插入和链走路径的众多组合。通过NMR，DSC，WAXD和SAXS彻底研究了配体类型和单体原料浓度对活性，区域选择性，聚合物（微）结构和结构/性质的影响。聚合物的热行为和晶体结构受甲基和较长烷基支化基团的结合程度的强烈影响。通过连续的自成核和退火热分馏，评估可结晶的序列长度和层状厚度，研究了聚合物的链异质性。