Synthesis and characterization of low retardation colorless polyimides containing m-phenylenediamine with different pendant groups

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2023-11-01 DOI:10.1177/09540083231208019

Xiaohong Li, Nafeesa Mushtaq, Jinglei Xing, Guofei Chen, Xingzhong Fang

{"title":"Synthesis and characterization of low retardation colorless polyimides containing <i>m</i>-phenylenediamine with different pendant groups","authors":"Xiaohong Li, Nafeesa Mushtaq, Jinglei Xing, Guofei Chen, Xingzhong Fang","doi":"10.1177/09540083231208019","DOIUrl":null,"url":null,"abstract":"In this study, 4-biphenyl-3,5-diaminobenzoate (E- m-PDA) was synthesized by three steps using 3,5-dinitrobenzoic acid as a starting material. Two series of colorless polyimides (CPIs) PI-(1a-1d) and PI-(2a-2d) were prepared by traditional two-step polycondensation of m-phenylenediamine ( m-PDA) based diamines with different pendant groups (-H, CF 3 , COOH and biphenyl ester) with aromatic dianhydrides BPADA and 6FDA, respectively. All of the prepared CPIs exhibited high thermal stability with 5% weight loss at temperatures ranging from 428 to 539°C in nitrogen, and glass transition temperatures ( T g s) ranging from 228 to 332°C. These PI films displayed a UV-vis absorption cut-off wavelength at 338–376 nm and transparency of 76%–89% at a wavelength of 450 nm. Both series of colorless PI films also showed low birefringence values of 0.0021–0.0100. In addition, the optical retardations of these CPIs were extremely low (48–220 nm), indicating low optical anisotropy of these CPI films. Colorless PI film PI-2d prepared based on E- m-PDA and 6FDA had good comprehensive properties of low birefringence ([Formula: see text] n of 0.0064), high T g (319°C) and excellent transparency ( T 450 of 88%).","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"79 9-10","pages":"0"},"PeriodicalIF":1.8000,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"High Performance Polymers","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1177/09540083231208019","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, 4-biphenyl-3,5-diaminobenzoate (E- m-PDA) was synthesized by three steps using 3,5-dinitrobenzoic acid as a starting material. Two series of colorless polyimides (CPIs) PI-(1a-1d) and PI-(2a-2d) were prepared by traditional two-step polycondensation of m-phenylenediamine ( m-PDA) based diamines with different pendant groups (-H, CF 3 , COOH and biphenyl ester) with aromatic dianhydrides BPADA and 6FDA, respectively. All of the prepared CPIs exhibited high thermal stability with 5% weight loss at temperatures ranging from 428 to 539°C in nitrogen, and glass transition temperatures ( T g s) ranging from 228 to 332°C. These PI films displayed a UV-vis absorption cut-off wavelength at 338–376 nm and transparency of 76%–89% at a wavelength of 450 nm. Both series of colorless PI films also showed low birefringence values of 0.0021–0.0100. In addition, the optical retardations of these CPIs were extremely low (48–220 nm), indicating low optical anisotropy of these CPI films. Colorless PI film PI-2d prepared based on E- m-PDA and 6FDA had good comprehensive properties of low birefringence ([Formula: see text] n of 0.0064), high T g (319°C) and excellent transparency ( T 450 of 88%).

查看原文本刊更多论文

含不同悬垂基团间苯二胺的低缓凝无色聚酰亚胺的合成与表征

本研究以3,5-二硝基苯甲酸为原料，经三步合成了4-联苯-3,5-二氨基苯甲酸酯(E- m-PDA)。以不同悬垂基团(- h、CF 3、COOH和联苯酯)的间苯二胺(m-PDA)为基础，分别与芳香二酐BPADA和6FDA采用传统的两步缩聚法制备了PI-(1a-1d)和PI-(2a-2d)两个系列无色聚酰亚胺(cpi)。在428 ~ 539℃的氮气和228 ~ 332℃的玻璃化转变温度下，所制备的cpi均表现出较高的热稳定性，失重5%。这些PI薄膜的紫外-可见吸收截止波长为338 ~ 376 nm，在450 nm处的透明度为76% ~ 89%。这两个系列的无色PI薄膜的双折射值也很低，为0.0021-0.0100。此外，CPI薄膜的光学延迟极低(48 ~ 220 nm)，表明CPI薄膜具有较低的光学各向异性。以E- m-PDA和6FDA为原料制备的PI-2d无色PI膜具有低双折射([公式:见文]n = 0.0064)、高tg(319℃)和优异的透明度(t450 = 88%)的综合性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.