Transparent polyimide and preparation method thereof

一种透明聚酰亚胺及其制备方法

Abstract

The invention discloses a transparent polyimide material. The transparent polyimide material is obtained by performing condensation polymerization on a 1,4-bi(3,4-dicarboxylic phenoxy)cyclohexane dianhydride monomer and a binary primary amine monomer. Because the dianhydride monomer is in an alicyclic structure, the formation of a charge transfer complex in polyimide molecules and between molecules can be effectively suppressed, and the transparent performance of the polymer is greatly improved; and meanwhile, according to the phthalic anhydride structures at two ends, the high reactivity of the dianhydride is kept. The glass transition temperature of the polyimide film is 200 to 300 DEG C, the ultraviolet absorption cutoff wavelength is 340 to 380nm, the light transmissivity at 450nm is 70 to 90 percent, and the transparent polyimide material has good application prospect in the fields of flexible substrate materials of solar cells, flexible transparent conductive film substrate materials, liquid crystal display materials and the like. The invention also discloses a dianhydride monomer which can be used for preparing the transparent polyimide resin material.
本发明公开了一种透明聚酰亚胺树脂材料,通过1,4-双(3,4-二羧酸苯氧基)环己烷二酐单体与二元伯胺单体缩聚反应得到。由于二酐单体具有脂环结构,可以有效抑制电荷转移络合物在聚酰亚胺分子内和分子间的形成,大大提高了聚合物的透明性能;同时两端苯酐结构保持了二酐的高反应活性。所得聚酰亚胺薄膜的玻璃化转变温度为200℃~300℃,紫外吸收截止波长为340nm~380nm,在450nm处的光透过率为70%~90%,在太阳能电池的柔性衬底材料、柔性透明导电膜衬底材料、液晶显示材料等领域有较好的应用前景。本发明还公开了一种二酐单体,可用于制备透明聚酰亚胺树脂材料。

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Cited By (4)

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    CN-103102489-AMay 15, 2013南京岳子化工有限公司Thermoplastic polyimide resin and preparation method thereof
    CN-103102489-BMay 27, 2015南京岳子化工有限公司一种热塑性聚酰亚胺树脂及其制备方法
    CN-104119531-AOctober 29, 2014中国科学院宁波材料技术与工程研究所一种易溶解的透明聚酰亚胺树脂及其制备方法
    CN-104119532-AOctober 29, 2014中国科学院宁波材料技术与工程研究所Transparent polyimide resin and preparation method thereof