含苯并咪唑基团CPI薄膜的制备及性能  

Preparation and Properties of CPI Film Containing Benzimidazole Group

作　　者：孙宇乾 徐勇[1] 叶志凤 曾炜 汤学妹 蒋家祥 Sun Yuqian;Xu Yong;Ye Zhifeng;Zeng Wei;Tang Xuemei;Jiang Jiaxiang(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu,210094;Institute of Chemical Engineering,Guangdong Academy of Sciences,Guangzhou,Guangdong,510665;R&D Centre,Nanjing Zhonghong Running Advanced Material Technology Co.,Ltd.,Nanjing,Jiangsu,210028;Department of R&D,Polyimide(Suzhou)Technology Co.,Ltd.,Suzhou,Jiangsu,215011)

机构地区：[1]南京理工大学化学与化工学院,江苏南京210094 [2]广东省科学院化工研究所,广东广州510665 [3]南京中鸿润宁新材料科技有限公司研发中心,江苏南京210028 [4]聚埃麦德(苏州)科技有限公司研发部,江苏苏州215011

出　　处：《现代塑料加工应用》2023年第2期1-4,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金面上项目(52073066);广东省科学院建设国内一流研究机构行动专项资金(2020GDASYL-20200120028)。

摘　　要：采用5-氨基-2-(4-氨基苯基)-苯并咪唑(DAPBI)为改性单体,与4,4′-(六氟异丙烯)二酞酸酐(6FDA)、2,2′-二(三氟甲基)二氨基联苯(TFMB)共聚合成了一系列聚酰胺酸(PAA)溶液。经流延涂膜、去溶剂和亚胺化等步骤制备了一系列无色透明聚酰亚胺(CPI)薄膜。利用紫外-可见分光光度计、差示扫描量热仪、电子万能试验机等对预聚体和CPI薄膜的结构与性能进行了研究。结果表明:DAPBI的引入使得CPI薄膜的透光性略有降低,但可有效提高其耐热性能和力学性能。其中二胺中TFMB与DAPBI物质的量之比为6.00∶4.00时,CPI薄膜在500 nm处的透光率为88.04%,玻璃化转变温度为340.54℃,拉伸强度为86.0 MPa。A series of polyamic acid(PAA)solutions were synthesized by copolymerization of 4,4′-hexafluoroisopropyl phthalic anhydride(6FDA),2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl(TFMB)and using 2-(4-aminophenyl)-5-aminobenzimidazole(DAPBI)as the modified monomer.The colorless transparent polyimide(CPI)films were prepared by tape casting,solvent removal and imidization.The structure and properties of precursors and CPI films were studied by UV-visible spectroscopy,differential scanning calorimetry and electronic universal testing machine.The results show that the introduction of DAPBI reduces the light transmittance of CPI slightly,but can effectively improve its heat resistance and mechanical properties.When molar ratio of TFMB to DAPBI in diamine is 6.00∶4.00,the light transmittance of CPI film at 500 nm is 88.04%,the glass transition temperature is 340.54℃,and the tensile strength is 86.0 MPa.

关 键 词：无色透明聚酰亚胺薄膜 透光性 耐热性能 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TQ323.7[化学工程—合成树脂塑料工业]