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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (8): 875-878. 上一篇    下一篇

研究简报

新型苯并噁唑侧基聚酰亚胺的合成、结构与性能研究

杨 进*,a 詹怀宇a 周雪松a 胡 健a
刘 辕a 顾 宜b 刘向阳b

  

  1. (a华南理工大学制浆造纸工程国家重点实验室 广州 510640)
    (b四川大学高分子科学与工程学院高分子材料工程国家重点实验室 成都 610065)

  • 投稿日期:2008-07-18 修回日期:2008-10-20 发布日期:2009-04-28
  • 通讯作者: 杨进

Synthesis, Structure and Properties of the Novel Polyimide with Benzoxazoline Pendent Group

Yang, Jin *,a Zhan, Huaiyu a Zhou, Xuesong a Hu, Jian a
Liu, Yuan a Gu, Yi b Liu, Xiangyang b
  

  1. (a State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640)
    (b College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering Sichuan University, Chengdu 610065)
  • Received:2008-07-18 Revised:2008-10-20 Published:2009-04-28
  • Contact: Yang, Jin

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被引次数

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为了改善聚酰亚胺的不溶不熔性, 一类可溶性苯并噁唑侧基聚酰亚胺树脂被成功制备. 从合成的新型二元胺单体出发, 制备了侧链为邻羟基苯胺酰胺结构的聚酰亚胺体系, 进一步催化环化邻羟基苯胺酰胺为苯并噁唑结构, 并对这两类不同结构的聚合物树脂进行了红外光谱的结构表征, 以及最终成膜的力学性能和耐热性能测试. 研究结果表明: 苯并噁唑侧基聚酰亚胺的力学性能优于相应的主链型聚酰亚胺, 且TGA分析表明, 其初始分解温度高达597 ℃, 有望用于航空航天方面高强、高模、耐高温的结构材料.

关键词: 聚酰亚胺, 苯并噁唑侧基, 力学性能

A novel diamine monomer 3,5-diaminobenzoic-4’-(o-hydroxy) aniline acylamide has been synthesized, and a new polyimide (PI) containing pendent benzoxazoline group was synthesized from this diamine, 3,3’,4,4’-oxydiphthalic dianhydride (ODPA) and bis(4-aminophenyl)ether (ODA) by a one-step high- temperature polycondensation with a certain catalyzer in 1-methyl-2-pyrrolidinone (NMP). This PI is soluble in NMP. At the same time, mechanical and thermally stable properties of the PI film were investigated. The excellent mechanical properties of general polyimide films are reasonably maintained, and the polyimide film with pendent groups showes higher tensile strength (158 MPa) and modulus (2.4 GPa). TGA study showes a typical two-step weight loss behavior corresponding to the pyrolysis of pendent groups and main chains of the PI with (o-hydroxy)-anilide, respectively. Moreover, the PI with benzoxazoline side groups has one-step weight loss behavior, and an initial decomposition temperature near 597 ℃ was obtained.

Key words: polyimide, benzoxazoline side group, mechanical property