Abstract:
A polymerization process and the resulting polymer composition, said process comprising polymerizing one or more addition polymerizable monomers and a polymerizable shuttling agent in the presence of at least one addition polymerization catalyst comprising a metal compound or complex and a cocatalyst under conditions characterized by the formation of a branched polymer, preferably comprising pseudo-block molecular architecture.
Abstract:
Embodiments of the invention provide a class of ethylene/α-olefÊn block interpolymers. The ethylene/α-olefÊn interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, M w /M n , greater than about 1.3. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block ethylene/α-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation ("TREF"), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the ethylene/α-olefin interpolymer has a molecular weight distribution, M w /M n , greater than about 1.3.
Abstract translation:本发明的实施方案提供一类乙烯/α-烯烃嵌段互聚物。 乙烯/α-烯烃互聚物的特征在于平均嵌段指数ABI,其大于零且高达约1.0,分子量分布为M / SUB>,大于约1.3。 优选地,嵌段指数为约0.2至约1.另外或替代地,嵌段乙烯/α-烯烃互聚物的特征在于具有通过升温洗脱分级(“TREF”)获得的至少一个级分,其中级分具有 大于约0.3并且高达约1.0的嵌段指数,并且所述乙烯/α-烯烃互聚物具有大于约1.3的分子量分布M S 。
Abstract:
Copolymers, especially multi-block copolymer containing therein two or more segments or blocks, are prepared by polymerizing propylene, 4-methyl-1-pentene, or another C 4-8 α-olefin in the presence of a composition comprising the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers having increased incidence of regio-irregular branching compared to the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
Abstract:
A supported, heterogeneous catalyst composition for use in polymerization of addition polymerizable monomers to form high molecular weight polymers, comprising: 1) a substrate comprising a solid, particulated, high surface area, surface modified, inorganic oxide compound, 2) a Group 4 metal complex of a bis(hydroxyarylaryloxy) ligand; and optionally 3) an activating cocatalyst for the metal complex.