Abstract In this work, polybenzoxazines based on phenol and aniline were prepared by curing as-synthesized and purified monomers in the presence of aromatic diboronic acid, BDBA. Condensation reactions between BOH groups of diboronic acid and phenolic OH groups of benzoxazine took place during curing only when unreacted phenol, or low mass oligomers were present in the medium. Generation of fragments involving B-O-C groups and significant improvement in thermal characteristics were detected upon curing the as-synthesized monomer in the presence of even 5 wt %BDBA. On the other hand, enhancement in thermal characteristics was not detected for the polybenzoxazine prepared by curing the purified monomer, when the wt % of BDBA was lower than 15%.

中文翻译：

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芳族二硼酸对苯酚苯胺基聚苯并恶嗪热学特性的影响

摘要 在这项工作中，通过在芳族二硼酸 BDBA 存在下固化合成和纯化的单体，制备了基于苯酚和苯胺的聚苯并恶嗪。仅当介质中存在未反应的苯酚或低质量低聚物时，二硼酸的 BOH 基团和苯并恶嗪的酚基 OH 基团之间才会发生缩合反应。在甚至 5 wt % BDBA 存在下固化合成的单体后，检测到涉及 BOC 基团的片段的产生和热特性的显着改善。另一方面，当BDBA的wt％低于15％时，通过固化纯化的单体制备的聚苯并恶嗪未检测到热特性的增强。