摘要
以苯胺、苯酚和多聚甲醛为原料,采用无溶剂法合成了BZ(苯并噁嗪)预聚体;然后将BZ预聚体进行一般固化和定向固化,并着重探讨了不同固化方式对固化产物[即PBZ(聚苯并噁嗪)]热稳定性的影响。研究结果表明:固化温度和固化方式对PBZ的热稳定性影响较大。180℃一般固化的聚合物之热稳定性相对最高,其热失重5%时的对应温度为291℃;160℃定向固化的聚合物之热稳定性相对最高,其热失重5%时的对应温度为341℃;对同样的BZ预聚体而言,160℃定向固化的聚合物之热稳定性优于180℃一般固化的聚合物。
With aniline, phenol and paraformaldehyde as raw materials, a BZ （benzoxazine） prepolymer was synthesized by solvent free method. Then the BZ prepolymer was respectively treated by general curing and directional curing, and the influences of different curing methods on thermal stability of curing product[namely PBZ （polybenzoxazine）] were emphatically discussed. The research results showed that the influences of curing temperatures and curing methods on thermal stability of PBZ were larger. The thermal stabilities of general curing polymer at 180 ℃ or directional curing polymer at 160 ℃ were relatively highest, which corresponding temperatures were 291 ℃ or 341 ℃ at 5% thermal weightlessness, and the thermal stability of the latter was better than that of the former for the same BZ prepolymers.
出处
《中国胶粘剂》
CAS
北大核心
2015年第1期5-8,共4页
China Adhesives
基金
河南省科技发展计划项目(142300410109)
河南省教育厅科学技术研究重点项目(12B150024)
关键词
苯并噁嗪
定向固化
热稳定性
benzoxazine （BZ）
directional curing
thermal stability
