异丙氧基官能化聚芳酰胺高温热处理高效制备聚对苯撑苯并双噁唑  

Preparation of Poly(p-phenylene Benzobisoxazole) by High Temperature Thermal Treatment of Isopropoxy Functionalized Aromatic Polyamides

作　　者：陈凤贵 高镱萌[2] 桂佳欣[1] 吕利平 CHEN Fenggui;GAO Yimeng;GUI Jiaxin;LU Liping(Chongqing Key Laboratory of Inorganic Special Functional Materials,College of Chemistry and Chemical Engineering,Yangtze Normal University,Chongqing 408100,China;Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China)

机构地区：[1]长江师范学院化学化工学院重庆市无机特种功能材料重点实验室,重庆408100 [2]中国科学院重庆绿色智能技术研究院,重庆400714

出　　处：《兵工学报》2019年第9期1911-1917,共7页Acta Armamentarii

基　　金：国家自然科学基金项目(51303206);重庆市教育委员会科技项目(KJ1601209);重庆市技术创新与应用示范项目(cstc2018jscx-msyb1317)

摘　　要：针对高性能纤维聚对苯撑苯并双噁唑(PBO)现有制备方法单体合成困难、聚合工艺复杂及纺丝难度大等问题,采用高温热处理方法制备PBO.合成4,6-二异丙氧基-1,3-二氨基苯作为单体,将其与对苯二甲酰氯缩聚制得PBO前驱体-异丙氧基官能化聚芳酰胺;该前驱体通过静电纺丝制成纳米纤维薄膜,并在350℃与氩气气氛等条件下,通过热处理成功实现了前驱体主链的分子内环化、制得目标PBO,制备出的PBO具有高达562℃的热降解温度。该方法摆脱了对传统易氧化4,6-二氨基-间苯二酚单体的依赖,显著降低了聚合和成型难度,丰富了PBO的制备方法学。4,6-diamino-1,3-dihydroxy-benzene(DAR)used as monomer for the synthesis of high-performance poly(p-phenylene benzobisoxazole)(PBO)is easily oxidized and difficultly synthesized by traditional method,and the polymerization process is complicated and the spinning operation is also difficult.A novel method was developed to synthesize PBO by high temperature thermal treatment of isopropoxy functionalized aromatic polyamide,which was prepared by polycondensation of 4,6-diisopropoxy-1,3-diamine-benzene and terephthalic chloride.And the obtained PBO exhibits excellent thermal degradation temperature up to 562℃.The proposed method is used to avoid DAR by replacement of the more stable monomer as 4,6-diisopropoxy-1,3-diamine-benzene,greatly simplify the polymerization process for the improved solubility of monomer and polymer,and easily spin the obtained PBO precursor into nanofibers.

关 键 词：高性能纤维 聚芳酰胺 热处理 前驱体 聚对苯撑苯并双噁唑 

分 类 号：O633.5[理学—高分子化学]