Mesophase microbead was used to analyze the growth of COPNA resin with SEM during reaction, and the thermostability of COPNA resin was analyzed with TGA.

• 采用扫描电镜(SEM)对反应过程中生成的中间相小球的尺寸变化分析COPNA树脂的生成情况;采用热重(TGA)研究COPNA树脂的热稳定性。