共聚低热膨胀聚酰亚胺薄膜的制备与表征

doi:10.11868/j.issn.1001-4381.2017.000830

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摘要

以4，4'-（六氟异丙烯）二酞酸酐（6FDA）为含氟二酐，4，4'-二氨基-2，2'-双三氟甲基联苯（TFMB）为含氟二胺，通过引入分子结构相对对称的刚性单体1，2，4，5-均苯四甲酸二酐（PMDA）进行共聚合成了5种含氟比例不同的透明聚酰亚胺薄膜，并对其性能进行了表征。分析表明：引入刚性单体共聚后薄膜的热稳定性和耐热性有所提高；薄膜的介电常数随着PMDA含量的上升而增加；共聚薄膜在可见光领域的透光率低于均聚薄膜；拉伸实验显示在添加少量PMDA后，薄膜的拉伸强度和弹性模量有所增大，但当PMDA含量过高时其力学性能反而下降；随着PMDA含量的增加，薄膜的热膨胀系数明显降低。

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	张明艳
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关键词 ：聚酰亚胺薄膜, 透明, 含氟, 共聚, 热膨胀系数

Abstract：

Five transparent polyimide thin films with different proportions of 1, 2, 4, 5-, pyromellitic dianhydride (PMDA) were made by copolymerization of 4, 4'-(six fluoro isopropenyl) two phthalic anhydride (6FDA), 4, 4'-two amino -2, 2'-double three trifluoromethyl biphenyl (TFMB) and PMDA, and their properties were characterized. The results show that thermal stability and heat resistance are increased after the introduction of rigid monomers; the dielectric constant of the films is increased with the increase of PMDA content; homopolymer film has higher light transmission rate than copolymer films in visible light; tensile test shows that adding a small amount of PMDA, the tensile strength and elastic modulus of the film are increased, but when the content of PMDA is higher than 40%, the mechanical properties are decreased; the coefficient of thermal expansion of the films are decreased obviously while PMDA content is increased.

Key words： polyimide film transparent fluorine containing copolymerization coefficient of thermal expansion

收稿日期: 2017-06-27 出版日期: 2019-05-17

中图分类号:

TQ317.3

基金资助:国家自然基金面上项目(51677045);黑龙江省博士后面上项目一等资助(LBH-Z16089);中国博士后面上项目一等资助(2017M610212)

通讯作者: 吴子剑 E-mail: zijian.wu@hrbust.edu.com

作者简介: 吴子剑(1983-), 男, 讲师, 博士, 研究方向:树脂基复合材料, 联系地址:哈尔滨市香坊区林园路4号哈尔滨理工大学南区(150040), E-mail:zijian.wu@hrbust.edu.com

引用本文:

张明艳, 高升, 吴子剑, 崔宏玉, 高岩. 共聚低热膨胀聚酰亚胺薄膜的制备与表征[J]. 材料工程, 2019, 47(5): 153-158.
Ming-yan ZHANG, Sheng GAO, Zi-jian WU, Hong-yu CUI, Yan GAO. Preparation and characterization of low expansion transparent copolyimide films. Journal of Materials Engineering, 2019, 47(5): 153-158.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.000830 或 http://jme.biam.ac.cn/CN/Y2019/V47/I5/153

Table 1 单体配比与试样编号

Fig.1 聚酰亚胺合成反应式

Fig.2 聚酰亚胺薄膜的红外吸收光谱

Table 2 PAA溶液的黏度数据

Table 3 聚酰亚胺薄膜的热性能

Fig.3 薄膜的介电常数与频率的关系

Fig.4 聚酰亚胺薄膜的紫外-可见光谱

Table 4 薄膜的光学性能

Table 5 薄膜的力学性能

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