三元共聚苯并咪唑型聚酰亚胺薄膜的合成及性能  

Synthesis and Properties of Ternary-Polymerization Benzimidazole Polyimide Films

作　　者：陈晓玲[1] 陈崇城[1] 胡苹 虞鑫海[2] 万传松 CHEN Xiaoling;CHEN Chongcheng;HU Ping;YU Xinhai;WAN Chuansong(College of New Materials and Shoes&Clothing Engineering,Liming Vocational University,Quanzhou 362000,China;School of Chemistry and Chemical Engineering,Donghua University,Shanghai 201600,China)

机构地区：[1]黎明职业大学新材料与鞋服工程学院,福建泉州362000 [2]东华大学化学与化工学院,上海201600

出　　处：《塑料工业》2024年第10期32-37,共6页China Plastics Industry

基　　金：福建省中青年教师教育科研项目(JAT191449);黎明职业大学科研基金(LMPT21001)。

摘　　要：随着柔性显示技术的快速发展,高性能透明聚酰亚胺的需求日益增大。然而,如何兼顾高透明、耐高温与高力学强度仍是当前聚酰亚胺研究的重要课题。本文以2-(4-氨基苯基)-5氨基苯并咪唑(APBIA)为改性单体,与2,2-双[4-(4-氨基苯氧基)苯基]六氟丙烷(HFBAPP)和4,4′-联苯醚二酐(ODPA)进行共聚,通过调控APBIA和HFBAPP两种二胺单体的物质的量比,制备出一系列苯并咪唑型含氟透明聚酰亚胺薄膜(APBIA/HFBAPP/ODPA),并对其结构及性能进行表征。结果表明,当二胺单体中APBIA的物质的量占比在50%以下时,可获得完整的PI薄膜,在苯并咪唑基团和含氟基团的协同作用下,这些薄膜表现出良好的综合性能,紫外-可见光范围内的透光率最高可达90.16%,玻璃化转变温度最高可达277.2℃,5%和10%的热失重温度最高分别可达495和520℃,拉伸强度最高可达184.8 MPa。其中,当APBIA与HFBAPP的物质的量比为3∶7时,薄膜的综合性能最为均衡,其玻璃化转变温度为268.9℃,5%和10%的热失重温度分别为477和512℃,紫外-可见光最高透过率为88.92%,拉伸强度为184.8 MPa。With the rapid developments of flexible display technology,the high performance transparent polyimide is urgently required.However,how to balance the high transparency,high temperature resistance and high mechanical strength of polyimide is still an important research topic.Here,a series of benzimidazole-based fluorinated transparent polyimide films{2-(4-aminophenyl)-5-aminobenzimidazole(APBIA)/2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane(HFBAPP)/4,4′-diphenyl ether dianhydride(ODPA)}with different molar ratios of APBIA and HFBAPP were prepared by using APBIA as the modified monomer to copolymerize with ODPA and HFBAPP.The structures and properties of polymers were characterized.The results show that when the molar ratio of APBIA in the diamine monomers does not exceed 50%,complete PI films could be obtained.With the synergistic effects of benzimidazole groups and fluorine-containing groups,these films exhibit good comprehensive performances.The highest transmittance in the ultraviolet-visible range reaches 90.16%,and the highest glass transition temperature is up to 277.2℃.The maximum thermogravimetric temperatures of 5%and 10%respectively reach 495 and 520℃,and the maximum tensile strength reaches 184.8 MPa.Specifically,when the molar ratio of APBIA and HFBAPP is 3∶7,the film exhibits the most balanced comprehensive properties.It features a glass transition temperature of 268.9℃,a 5%thermogravimetric temperature of 477℃,a 10%thermogravimetric temperature of 512℃,the highest transmission of 88.92%in the ultraviolet-visible range,and a tensile strength of 184.8 MPa.

关 键 词：苯并咪唑 三氟甲基 聚酰亚胺薄膜 共聚 合成 

分 类 号：TQ314.24[化学工程—高聚物工业]