申请人:Université de Liège
公开号:EP3502153A1
公开(公告)日:2019-06-26
Preparation of a block copolymer comprising a polyethylene block and a block formed of the polymerization of one or more vinyl monomers, at least 50 mol% of which being selected from the list consisting of ethylene, vinyl esters, non-conjugated N-vinyl monomers, acrylonitrile, (meth)acrylates and (meth)acrylamides, at least one of said one or more vinyl monomers not being ethylene, the process comprising:
a. Polymerizing ethylene or the one or more vinyl monomers in presence of an organic cobalt complex, thereby forming a macroinitiator,
b. Contacting the macroinitiator with either
i. The one or more vinyl monomers, if ethylene was polymerized in step a, or
ii. ethylene, if the one or more vinyl monomers were polymerized in step a,
thereby forming a second polymer block, and thereby forming the block copolymer, wherein forming the polyethylene block is performed under a pressure of at least 300 bar.
制备嵌段共聚物,该嵌段共聚物包括聚乙烯嵌段和由一种或多种乙烯基单体聚合形成的嵌段,其中至少 50 摩尔%的乙烯基单体选自乙烯、乙烯基酯、非共轭 N-乙烯基单体、丙烯腈、(甲基)丙烯酸酯和(甲基)丙烯酰胺,所述一种或多种乙烯基单体中至少有一种不是乙烯,该工艺包括
a.在有机钴络合物存在下聚合乙烯或一种或多种乙烯基单体,从而形成大引发剂、
b.将大引发剂与以下任一物质接触
i.一种或多种乙烯基单体(如果乙烯在步骤 a 中聚合),或
ii. 乙烯(如果在步骤 a 中聚合了一种或多种乙烯基单体)、
从而形成第二聚合物嵌段,进而形成嵌段共聚物,其中聚乙烯嵌段的形成是在至少 300 巴的压力下进行的。