An ester-amide block copolymer of the formula (1):
wherein R is an aromatic hydrocarbon group with 6-20 carbon atoms and G is a polyorganosiloxane residue, said copolymer having a weight average molecular weight of 30,000 - 1,000,000. This copolymer is prepared by polycondensing an activated acyl lactam-terminated aromatic amide with a diol by a bulk polymerization procedure in a molten state.
式(1)的酯-酰胺嵌段共聚物:
其中 R 是具有 6-20 个碳原子的
芳香烃基团,G 是聚有机
硅氧烷残基,所述共聚物的重量平均分子量为 30,000 - 1,000,000。这种共聚物是在熔融状态下,通过体聚合程序将活化的酰基内酰胺端芳香族酰胺与二元醇进行缩聚而制备的。