Ethylene Polymerization and Copolymerization with Polar Monomers by Cationic Phosphine Phosphonic Amide Palladium Complexes
作者:Xuelin Sui、Shengyu Dai、Changle Chen
DOI:10.1021/acscatal.5b01490
日期:2015.10.2
The synthesis, characterization, and olefin (co)polymerization studies of a series of palladium complexes bearing phosphine phosphonic amide ligands were investigated. In this ligand framework, substituents on three positions could be modulated independently, which distinguishes this class of ligand and provides a great deal of flexibilities and opportunities to tune the catalytic properties. The palladium
研究了一系列带有膦膦酰胺配体的钯配合物的合成,表征和烯烃(共)聚合研究。在该配体框架中,可以独立地调节三个位置上的取代基,这区别了这类配体,并提供了大量的灵活性和机会来调节催化性能。钯复合物与Ø膦上的-MeO-Ph取代基是乙烯聚合反应中活性最高的钯催化剂之一,其活性比相应的经典膦-磺酸盐钯配合物高1个数量级。同时,由这种新的钯配合物生成的聚乙烯显示出约。与传统的膦-磺酸盐钯配合物相比,分子量高6倍。在乙烯/丙烯酸甲酯的共聚中,新的钯配合物显示出较低的活性,生成的丙烯酸甲酯掺入量相似且分子量高得多的共聚物。新的钯配合物还能够使乙烯与其他极性单体(包括丁基乙烯基醚和乙酸烯丙酯)共聚,