【摘要】 合成了分子量不同的酚醛树脂预聚体,以此为多元酚基体采用悬浮法通过控制苯酚与苯胺的摩尔配比合成了一系列苯并口恶嗪环状结构含量不同的酚醛型苯并口恶嗪中间体树脂(P-BOZ),并用FT-IR和1H-NMR对其结构进行了表征,用环球法对其软化点进行了测量。研究表明,P-BOZ的软化点随酚醛树脂预聚体分子量的增加而提高,随苯并口恶嗪环状结构含量的增加而降低,这一现象与分子间酚羟基的氢键作用有关。因此,通过分子设计可以提高其软化点。更多还原

【Abstract】 Benzoxazine intermediate powders based on phenolic oligomer(P-BOZ),which had different content of benzoxazine ring via controlling the mole ratio of phenol and aniline,were synthesized by suspension method.Their structures were confirmed by FT-IR and 1H-NMR.Their softening points were also measured with investigation of the molecular structures of P-BOZs,it is found that the softening points of P-BOZs is improved when the molecular weight of phenolic oligomer increases,and lowers down when the content of benzoxazine ring in P-BOZs increased.Pilot study indicates that these phenomenons are relative to hydrogen bonding interaction from phenolic hydroxyls between intermediates.更多还原