A new metallocene-based polymerization mechanism is elucidated in which a zirconium hydride center inserts α-methylstyrene at the start of a polymer chain. The hydride is then regenerated by hydrogenation to release a polyolefin containing a single terminal α-methylstyrenyl group. Through the use of the difunctional monomer 1,3-diisopropenylbenzene, this catalytic hydride insertion polymerization is applied to the production of linear polyethylene and ethylene-hexene copolymers containing an isopropenylbenzene end group. Conducting simple radical polymerizations in the presence of this new type of macromonomer leads to diblock copolymers containing a polyolefin attached to an acrylate, methacrylate, vinyl ester, or styrenic segments. The new materials are readily available and exhibit interfacial phenomena, including the mediation of the mixing of immiscible polymer blends.

中文翻译：

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来自多功能新型大分子单体的聚烯烃-极性嵌段共聚物

阐明了一种新的基于茂金属的聚合机制，其中氢化锆中心在聚合物链的开头插入 α-甲基苯乙烯。然后氢化物通过氢化再生以释放含有单个末端α-甲基苯乙烯基的聚烯烃。通过使用双官能单体1,3-二异丙烯基苯，将该催化氢化物插入聚合应用于生产含有异丙烯基苯端基的线性聚乙烯和乙烯-己烯共聚物。在这种新型大分子单体的存在下进行简单的自由基聚合会产生包含连接到丙烯酸酯、甲基丙烯酸酯、乙烯基酯或苯乙烯链段的聚烯烃的二嵌段共聚物。新材料很容易获得并表现出界面现象，