Compositions comprising polyphenylene ether copolymers are prepared by blending, preferably in the melt, a functionalized polyphenylene ether with a graft polymer, which is in turn prepared by the free radical reaction of a base polymer such as polyethylene or polypropylene with an olefinic compound containing a tertiary alkyl ester group, which may be a simple carboxylic acid or a carbamic acid ester group. The t-butyl groups are removed by thermal degradation under the reaction conditions to yield a carboxylic acid- or amino-functionalized graft polymer which reacts with the polyphenylene ether.
聚苯醚共聚物的制备方法是将官能化聚苯醚与接枝聚合物混合(最好是熔融状态),而接枝聚合物则是由聚
乙烯或聚
丙烯等基础聚合物与含有叔烷基酯基(可以是简单的
羧酸或
氨基甲酸酯基)的烯烃化合物发生自由基反应而制备的。在反应条件下,通过热降解去除叔丁基,生成
羧酸或
氨基官能化接枝聚合物,与聚苯醚反应。