高等学校化学学报

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (3): 623.

• 研究论文 • 上一篇    

氮化硼纤维先驱体的制备与表征

邓橙, 宋永才, 王应德, 李义和, 雷永鹏   

  1. 国防科技大学航天与材料工程学院, 新型陶瓷纤维及其复合材料国防科技重点实验室, 长沙 410073
  • 收稿日期:2009-03-26 出版日期:2010-03-10 发布日期:2010-03-10
  • 通讯作者: 宋永才, 男, 教授, 博士生导师, 主要从事高性能特种陶瓷纤维研究. E-mail: songyongcai@yahoo.com.cn
  • 基金资助:

    国家“八六三”计划项目(批准号: 2006AA03A217)资助.

Preparation and Characterization of Polymeric Precursor for Boron Nitride Fibers

DENG Cheng, SONG Yong-Cai*, WANG Ying-De, LI Yi-He, LEI Yong-Peng   

  1. College of Aerospace & Materials Engineering, State Key Laboratory of Advanced Ceramic Fibers & Composites, National University of Defense Technology, Changsha 410073, China
  • Received:2009-03-26 Online:2010-03-10 Published:2010-03-10
  • Contact: SONG Yong-Cai. E-mail: songyongcai@yahoo.com.cn
  • Supported by:

    国家“八六三”计划项目(批准号: 2006AA03A217)资助.

PDF (PC)

被引次数

14

摘要：

以三氯环硼氮烷为原料, 将其与正丙胺/异丙胺进行共取代反应, 制得了不同结构的取代单体, 再经热聚合反应获得了相应的聚硼氮烷先驱体. 通过分析不同正丙胺/异丙胺配比制得的聚合产物的组成与结构, 探讨了不同单体的胺基取代基对先驱体的聚合反应性及对产物结构的影响. 结果表明, 当正丙胺/异丙胺摩尔比为2∶1, 聚合温度为150 ℃, 反应时间为10 h时, 合成产物具有近似线性分子结构, 熔点为90 ℃, 具有良好的成丝性, 可获得平均直径10~20 μm, 组成为BC1.27N1.52Hx的先驱体纤维, 先驱体纤维再经不熔化处理及1200 ℃氨气高温煅烧等工艺可获得近化学计量比的氮化硼纤维.

关键词: 三氯环硼氮烷; 聚硼氮烷; 氮化硼纤维先驱体

Abstract:

Based on B-trichloroborazine(TCB) with boron-nitrogen ring structure, the monomer was synthesized by substitution reaction with different molar ratio of propylamine/isopropylamine, then the corresponding polyborazine was obtained through thermal polymerization. The chemical component and structure of polyborazine were analyzed, and the influence of different propylamine/isopropylamine molar ratio on the polyborazine properties and spinnability were examined. The results indicate that polyborazine precursor prepared at 150 ℃ for 10 h and propylamine/isopropylamine molar ratio 2∶1, could possess nearly linear molecule skeleton and be prone to melt spinnability. When melt at 90 ℃, the precursor fibers are prepared with average diameter 10—20 μm and BC1.27N1.52Hx structure. After curing process and sintered in NH3 at 1200 ℃, the near-stoichiometric BN fibers was obtained, which proved this precursor is apt for preparation of BN fibers.

Key words: B-trichloroborazine; Polyborazine; Precursor of boron nitride fiber

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