Hyperbranched benzazole polymers having repeating units of the formula:
wherein Q is —O—, —S— or —NH—, and the terminal groups R are carboxylic acids with their total number equals n+1. A generic method for preparing the polymers is provided. Also provided are the star block copolymers derived from these hyperbranched benzazole polymers and linear poly(ether-ketones) having the following generic formula
where x and y are the numbers of repeat units for each poly(ether-ketone) chain; the placement of the carbonyl moieties in the repeat units of the poly(ether-ketone) chains can be either meta or para to the phenoxy groups; the maximal number of poly(ether-ketone) chains is n+1, where n=number of repeat units for hyperbranched polybenzazole). A general method for synthesizing these star block copolymers is provided.
本文介绍了具有重复单元公式的超支化
苯唑聚合物:其中Q为—O—、—S—或—NH—,末端基团R为
羧酸,其总数等于n+1。提供了制备这些聚合物的通用方法。还提供了由这些超支化
苯唑聚合物和线性聚
醚酮衍生的星形嵌段共聚物,其通用公式如下:其中x和y是每个聚
醚酮链的重复单元数;聚
醚酮链中的羰基基团可以是与苯氧基团的meta或para位相邻的;聚
醚酮链的最大数量为n+1,其中n为超支化聚
苯唑的重复单元数。提供了一种合成这些星形嵌段共聚物的通用方法。