耐高温透明阻燃聚酰亚胺介电薄膜的制备及性能  

Preparation and Properties of Temperature Resistant,Transparent and Flame Resistant Polyimide Dielectric Film

作　　者：梁昊 李欣膂 黄祚刚 刘继延[1] 刘学清[1] LIANG Hao;LI Xinlyu;HUANG Zuogang;LIU Jiyan;LIU Xueqing(Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,College of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056,China)

机构地区：[1]江汉大学光电材料与技术学院,光电化学材料与器件教育部重点实验室,湖北武汉430056

出　　处：《塑料工业》2024年第3期62-68,共7页China Plastics Industry

基　　金：国家重点研发计划(2022YFB3603702);江汉大学重大创新支持计划项目(2023ZDCX01);湖北省创新团队项目(T201935)。

摘　　要：通过4-溴苯并环丁烯与苯基二氯膦反应,再经过氧化得到二苯并环丁烯基苯基膦氧(DBPPO),其熔点为107℃,熔融态具有优异的加工性能。DBPPO可以自聚,也可与双马来酰亚胺(BMI-2B)共聚得到膦氧聚酰亚胺。通过改变DBPPO和BMI-2B的物质的量比,制备了一系列的膦氧聚酰亚胺,采用宽频介电阻抗松弛谱仪、热重分析仪、紫外-可见分光光度计和微型燃烧量热仪对其介电性能、热稳定性、光学性能和阻燃性能等进行了研究。结果表明,当DBPPO和BMI-2B的物质的量比为1∶1时,制备的膦氧聚酰亚胺PI-11的介电常数为3.53,介电损耗正切值(1 MHz)为0.052,5%热失重温度为478℃,800 nm透光率为94.5%。此外,PI-11燃烧过程中总释放热与BMI-2B相比降低了45.7%,表明该物质具有很好的阻燃性能。Dibenzocyclobutenyl phenylphosphine oxide(DBPPO)was prepared by the oxidation reaction of the product from the reaction of 4-bromobenzocyclobutene and phenyl dichlorophosphine.The DBPPO shows an excellent processing property with a melting temperature of 107℃.DBPPO can self-polymerize or copolymerize with bismaleimide(BMI-2B)to obtain phosphine oxide polyimide.A series of phosphine oxide polyimide were prepared by varying the molar ratios of DBPPO to BMI-2B.The dielectric properties,thermal stability,optical properties and fire resistance properties of phosphine oxide polyimide were investigated via a broadband dielectric impedance relaxation spectrometer,thermogravimetric analyzer,UV-visible spectrophotometer and micro combustion calorimeter.The results show that when the molar ratio of DBPPO to BMI-2B is 1∶1,the prepared phosphine oxygen polyimide(PI-11)has a dielectric constant of 3.53 and a tangent value of dielectric loss of 0.052(1 MHz).The temperature of 5%weight loss of PI-11 is 478℃.The transmittance of PI-11 is 94.5%at 800 nm.In addition,compared with BMI-2B,the total heat release of PI-11 during combustion is reduced by 45.7%,indicating the good flame resistance of PI-11.

关 键 词：苯并环丁烯 双马来酰亚胺 聚酰亚胺 介电常数 阻燃性能 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]