三氯环硼氮烷和聚硼氮烷的合成与表征

摘要

以三氯化硼和氯化铵为原料,甲苯为溶剂,高产率(98%)地合成了具有硼和氮的六元环结构的三氯环硼氮烷(1);1分别与正丙胺(Ⅰ)和异丙胺(Ⅱ)反应制得正丙胺基环硼氮烷(1~Ⅰ)和异丙胺基环硼氮烷(1~Ⅱ);1~Ⅰ和1~Ⅱ经过脱胺和热聚合反应制得聚硼氮烷先驱体(2和3).用IR,NMR和XRD等对2和3的组成与结构进行了分析,探讨了聚硼氮烷的胺基取代基对聚硼氮烷聚合反应性及产物结构的影响.研究结果表明,3具有更强的热聚合特性.%B-trichloroborazine(1) with boron-nitrogen ring structure in yield of 98% was synthesized by the reaction of boron trichloride and ammonium chloride in toluene. n-Propylamine-borazine(1~Ⅰ) and isopropylamine-borazine(1~Ⅱ) were prepared by the reaction of 1 with n-propylamine(Ⅰ) and isopropylamine(Ⅱ), respectively. Polyborazine precursors(2 and 3 ) were obtained by deamination and thermal polymerization of 1~Ⅰ and 1~Ⅱ, respectively. The chemical components and structures of 2 and 3 were characterized by IR, NMR, XRD and TG. Effect of amino-substitution of polyborazine on polymerization of polyborazine and structure of products were investigated. The results showed that 3 exhibited good thermal polymerization.