烯丙基COPNA-BMI树脂微球的制备及表征

以烯丙基缩合多核芳烃-双马来酰亚胺(COPNA-BMI)预聚树脂为原料、以硅油为分散和导热介质,通过悬浮聚合法制备烯丙基COPNA-BMI树脂微球。采用SEM研究树脂微球的形态;采用FT-IR研究树脂微球悬浮聚合前后官能团的变化;采用TG-DTG和SEM研究树脂微球的耐热性和炭化形态。研究表明,烯丙基COPNA-BMI树脂微球具有很好的球形和表面光洁度,其粒径主要分布在10μm～20μm之间;经过悬浮聚合后,烯丙基COPNA-BMI树脂碳碳双键的特征吸收峰消失;该树脂微球具有优良的耐热性,其炭化产物是具有很好球形度的炭微球。

Preparation and Characterization of the Allyl COPNA-BMI Resin Microspheres

The copolymer of allyl condensed polynuclear aromatic (COPNA) resin and bismaleimide (BMI) was used to prepare new resin microspheres using silicone oil as dispersant by means of suspension polymerization. The morphologies of the allyl COPNA-BMI resin microspheres were investigated through SEM. The chemical structures of the resin microspheres were characterized by FT-IR. Moreover,the thermal behavior and morphologies of the resin microspheres were studied by TG-DTG and SEM,respectively. The results show that the resin microspheres with size of 10μm～20μm have fine degree of sphericity and smoothness. The curing reaction of the allyl COPNA-BMI resin has finished after suspension polymerization. The resin microspheres possess excellent thermal properties,indicated by that initial decomposition temperature is 420 ℃and carbonization yield arrives at 49.1% in nitrogen. Furthermore,the pyrolysis product of the resin microspheres are made up of carbon spheres with fine degree of sphericity.