两步封端法提高聚酰亚胺薄膜的光学性能

岳靖宇; 郇恒建; 苏传祥; 高子凤; 赵剑英; 高连勋

doi:10.11777/j.issn1000-3304.2023.23017

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两步封端法提高聚酰亚胺薄膜的光学性能

研究论文 | 更新时间：2023-09-25

- 两步封端法提高聚酰亚胺薄膜的光学性能
- The Optical Properties of Polyimide Films Improved by Two-step End-capping Method
- 高分子学报 2023年54卷第8期页码：1229-1240
- 作者机构：
  
  1.山东理工大学化学化工学院淄博 255049
  2.中国科学院长春应用化学研究所高分子复合材料工程国家重点实验室长春 130022
- 作者简介：
  
  E-mail: zhaojianying@sdut.edu.cn
  lxgao@ciac.ac.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2023.23017
  中图分类号：
- 纸质出版日期：2023-08-20，
  
  网络出版日期：2023-04-14，
  
  收稿日期：2023-01-18，
  
  录用日期：2023-02-27
扫描看全文
岳靖宇,郇恒建,苏传祥等.两步封端法提高聚酰亚胺薄膜的光学性能[J].高分子学报,2023,54(08):1229-1240.

Yue Jing-yu,Huan Heng-jian,Su Chuan-xiang,et al.The Optical Properties of Polyimide Films Improved by Two-step End-capping Method[J].ACTA POLYMERICA SINICA,2023,54(08):1229-1240.
岳靖宇,郇恒建,苏传祥等.两步封端法提高聚酰亚胺薄膜的光学性能[J].高分子学报,2023,54(08):1229-1240. DOI： 10.11777/j.issn1000-3304.2023.23017.

Yue Jing-yu,Huan Heng-jian,Su Chuan-xiang,et al.The Optical Properties of Polyimide Films Improved by Two-step End-capping Method[J].ACTA POLYMERICA SINICA,2023,54(08):1229-1240. DOI： 10.11777/j.issn1000-3304.2023.23017.

摘要

聚酰亚胺薄膜容易呈现特征性黄色，主要原因是其高密度芳香环导致的电子转移络合物(CTC)效应，本文研究发现聚酰胺酸亚胺化过程中所生成的含氮氧化物、偶氮生色团及蒽醌有色结构也对聚酰亚胺薄膜的光学性质有重要影响. 将4

4-二氨基二苯醚(ODA)与3

4'-联苯四甲酸二酐(BPDA)进行缩聚反应制备聚酰胺酸后，加入二酐单体封端聚酰胺酸树脂(PAA)的末端氨基，以防止其端氨基氧化或偶联为―N＝O和―N＝N―生色团；而后再加入乙二醇封端聚酰胺酸树脂的末端酐基，以防止末端酐基与PAA二胺单体链段生成有色蒽醌结构，并通过热亚胺化法制得聚酰亚胺薄膜. 实验结果表明，封端的与未封端的聚酰亚胺薄膜相比，其紫外截止波长(

cut

)左移，颜色变浅，在450 nm处的紫外透过率由17.0%提高到39.0%，最高透过率

max

从94.5%提高到99.5%，并使封端聚酰亚胺薄膜机械性能和耐热性相应增强，所以两步封端法可有效提高聚酰亚胺薄膜的光学性能.

Abstract

The NO

/azo chromophore and the colored anthraquinone structures are important reasons for coloring PI except the well-known charge trasfer complex (CTC) effects

the polyamide acid (PAA) was synthesized from 3

‍3'

‍4

‍4'-biphenyl tetracarboxylic dianhydride (BPDA)/4

‍4'-oxydianiline (ODA) and the polyimide film was prepared by thermal imidization. The BPDA were used as blockers to cap the residual amino of PAA

and the amino groups were prevented from producing the chromophore; the ethylene glycol was used to cap the terminal anhydride group of PAA to prevente the formation of the colored anthraquinone units

which was produced from the diamine segments substituted by the terminal anhydride groups

then the light color and high transmittance polyimide (PI) films were obtained. The test results show that the cutoff wavelength of the capped PI films shifted to the left

the color of PI films becomes lighter

the UV transmittance at 450 nm increased from 17% to 39%. The maximum transmittance was up to 99.5%

the thermal and mechanical properties of the capped polyimide films were also improved. So

the two-step end-capping method has universal applicability to improve the optical properties of polyimide films.

关键词

无色透明聚酰亚胺电子转移络合物两步封端热亚胺化

Keywords

Colorless polyimideCharge transfer complexEnd-cappingThermal imidization

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