N位取代聚苯并咪唑酰亚胺薄膜: 改善的溶解性与透过率  

N-substituted Poly(benzimidazole-imide)Films:Improved Solubility and Transmittance

作　　者：柯钊 陈海权 张轶材 闫晓莹 李慧[1] 钱广涛 于有海 KE Zhao;CHEN Haiquan;ZHANG Yicai;YAN Xiaoying;LI Hui;QIAN Guangtao;YU Youhai(Center for Advanced Low-Dimension Materials,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Material Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学材料科学与工程学院纤维材料改性国家重点实验室先进低维材料中心,上海201620

出　　处：《绝缘材料》2021年第11期55-61,共7页Insulating Materials

基　　金：广东省重点领域研究开发计划项目(2020B010182002);东华大学研究启动基金项目(285-07-005702)。

摘　　要：试验合成了两种新型的N-苯基取代苯并咪唑二胺,区别在于N-苯基的邻位分别由甲基和氟原子取代。将新型二胺分别与二酐4,4′-(六氟异丙烯)二酞酸酐(6FDA)和4,4′-氧双邻苯二甲酸酐(ODPA)通过两步热亚胺法制备聚苯并咪唑酰亚胺(PBII)薄膜,并对新型二胺单体及PBII薄膜进行了性能测试与表征。结果表明:新型PBII薄膜表现出良好的耐热性(玻璃化转变温度T_(g)=341~381℃)和拉伸强度(σ=95~135 MPa)。不同邻位取代的N-苯基破坏了分子的有效堆积,使得PBII薄膜的溶解性和光学透明性得到改善。Two novel diamines contained N-phenyl substituted benzimidazole were synthesized,and their difference was that the ortho-position of N-phenyl was substituted by methyl and fluorine atom,respectively.The novel diamines and commercially available dianhydrides 4,4′-(hexafluoroisopropylidene)diphthalic anhydride(6FDA)and 4,4′-oxydiphthalic anhydride(ODPA)were used to prepare poly(benzimidazole-imide)(PBII)films by two-step thermal imidization.The properties of new diamine monomer and PBII films were tested and characterized.The results show that the PBII films exhibit good thermal properties(glass transition temperature T_(g)=341−381℃)and mechanical properties(σ=95−135 MPa).The N-phenyl groups with different ortho units destroy the effective molecular packing,which improves the solubility and optical transmittance of the PBII films.

关 键 词：聚苯并咪唑酰亚胺 耐热稳定性 光学透过率 

分 类 号：TM215.3[一般工业技术—材料科学与工程]