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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (05): 449-452. 上一篇    下一篇

研究简报

一种高可溶、高光学透明含氟聚酰亚胺的合成与表征

汪称意，赵辉鹏，李光*，江建明   

  1. (东华大学材料学院 纤维材料改性国家重点实验室 上海 201620)
  • 投稿日期:2009-06-24 修回日期:2009-09-26 发布日期:2010-03-14
  • 通讯作者: 汪称意 E-mail:wangcy@mail.dhu.edu.cn
  • 基金资助:

    国家自然科学基金

Synthesis and Characterization of Fluorinated Polyimide with High Solubility and Optical Transparency

Wang Chenyi Zhao Huipeng Li Guang* Jiang Jianming   

  1. (State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620)
  • Received:2009-06-24 Revised:2009-09-26 Published:2010-03-14
  • Contact: WANG Chen－Yi E-mail:wangcy@mail.dhu.edu.cn

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被引次数

14 | 6

由自制芳香二胺单体9,9-双(3,5-二氟-4-胺基苯基)芴和商品化二酐单体4,4'-(六氟异丙基)双邻苯二甲酸酐经一步法高温缩聚制备了一种新型含氟聚酰亚胺. 分别用FT-IR、1H NMR和19F NMR对所制聚酰亚胺结构进行了表征. 结果证实其与所设计的结构完全一致, 并且酰亚胺化反应完全. 该含氟聚酰亚胺表现出高的溶解性: 室温下在N-甲基-2-吡咯烷酮、N,N-二甲基乙酰胺、N,N-二甲基甲酰胺、氯仿、二氯甲烷、四氢呋喃等常规溶剂中的溶解度可达10 wt%以上. 由该聚酰亚胺溶液所制的薄膜无色透明, 截断波长在315 nm, 400 nm波长后的透光率在84%以上. 此外该含氟聚酰亚胺还表现出良好的热学性能和机械性能: 玻璃化转变温度在377 ℃, 空气和氮气中10%热失重温度均在539 ℃以上; 其薄膜的拉伸强度在70～80 MPa, 断裂伸长率在4%～8%, 起始模量为2.6 GPa.

关键词: 含氟聚酰亚胺, 溶解性, 光学透明性

A novel fluorinated polyimide (PI 3) containing fluorenylene cardo structure, was prepared from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene (1) and 4,4'-(2,2-hexafluoropropylene)bis(phthalic anhydride) (2) via a one-step high-temperature polycondensation. FT-IR, 1H and 19F NMR spectra were used to investigate the chemical structure of PI 3. The results confirmed that the structure of PI 3 was in good agreement with the proposed structure and the imidization was conducted completely between 1 and 2. The obtained PI 3 showed high solubility, with the dissolvability higher than 10 wt% in most common solvents such as N-methyl-2-pyrrolidinone, N,N-dimethylacetamide, N,N-dimethylformamide, chloroform, dichloromethane and tetrahydrofuran. The resulting PI film exhibited excellent optical transparency and colorlessness, with a UV-Vis absorption edge at 315 nm and the transparency at 400 nm higher than 84%. Furthermore, PI 3 also possessed good thermal and mechanical properties. The temperature at 10% weight loss was beyond 539 ℃in both air and nitrogen atmospheres, and the glass-transition temperature was at 377 ℃. The film had strengths at break of 70～80 MPa, elongations at break of 4%～8%, and initial modulus of 2.6 GPa.

Key words: fluorinated polyimide, solubility, optical transparency