英语语法分析

The results showed that PEI was an effective toughener of copolymeric bismaleimide resin.

实验结果表明，PEI是共聚双马树脂的有效增韧剂；

This paper deals with the molecular design, syntheses and applications of different reactive copolymeric compatibilizers.

本文介绍了反应型共聚物相容剂的分子设计、 合成及其应用。