申请人:The B.F. GOODRICH Company
公开号:EP0109052A1
公开(公告)日:1984-05-23
Under particular conditions, a cationic ring-opening polymerization of an oxirane monomer selected from the group consisting of an acyclic glycidyl ether, a cyclic glycidyl ether, and a haloalkyl epoxide, in the presence of a hydroxyl-contain- mg backbone of a polymer ("HCB") and a particular catalyst, produces a polymenzation having 'living polymerization' characteristics, provided the OH groups are aliphatic OH groups and not aromatic OH groups. The result is a graft copolymer the molecular weight (mol wt) of which is directly proportional to the conversion of the monomer. The HCB, which may have from 1 to 400 pendant OH groups, and more preferably at least 7 pendant OH groups, provides grafting sites for the grafting segments. Where a grafted segment contains halogen, the segment may be aminated. If the HCB is hydrophobic, the aminated block copolymer is amphiphilic.
在特定条件下,选自无环状缩水甘油醚、环状缩水甘油醚和卤代烷基环氧化物的环氧乙烷单体,在含羟基的聚合物骨架("HCB")和特定催化剂存在下进行阳离子开环聚合,可产生具有 "活聚合 "特性的聚合体,但羟基必须是脂肪族羟基而不是芳香族羟基。其结果是接枝共聚物的分子量(摩尔重量)与单体的转化率成正比。HCB 可具有 1 至 400 个悬垂羟基,更优选至少 7 个悬垂羟基,为接枝段提供接枝位点。当接枝段含有卤素时,可对接枝段进行胺化处理。如果六氯苯具有疏水性,则胺化嵌段共聚物具有两亲性。