表面覆膜处理对电子设备用PMI泡沫材料性能影响研究  

Performance Impact Study on the Surface Coating Treatment of PMI Foam Used for Electronic Equipment

作　　者：曹洪志 王宇[1] 唐飞熊[1] 王庆兵[1] 周杰文 Cao Hong-zhi;Wang Yu;Tang Fei-xiong;Wang Qing-bing;Zhou Jie-wen(The 29th Research Institute of CETC,Sichuan Chengdu 610036)

机构地区：[1]中国电子科技集团公司第二十九研究所,四川成都610036

出　　处：《电子质量》2021年第1期34-38,共5页Electronics Quality

基　　金：技术基础科研项目(项目编号:JSZL2018210A004)。

摘　　要：PMI泡沫可用作军用电子设备中的高性能支撑材料,但在加工与使用过程中,PMI泡沫易吸潮,导致尺寸和性能变化。对PMI泡沫进行表面覆膜处理,可以提升PMI泡沫的尺寸和性能稳定性,该文主要研究覆膜处理对PMI泡沫的尺寸、吸水性、电性能等的影响规律。研究表明,覆膜处理后,泡沫材料的吸水性降低、尺寸稳定性提升、介电常数和损耗角正切值变差。该文研究对电子设备支撑PMI泡沫的选用提供了指导作用。PMI foam can be used as a high performance support material for military electronic equipment.However,PMI foam is easy to absorb moisture during processing and use,resulting in size and performance changes.Surface coating treatment can enhance the size and performance stability of PMI foam.The influence of surface coating treatment on the size,water absorption and electrical properties of PMI foam was studied in this paper.The results showed that the water absorption decreases,the dimensional stability increases,the dielectric constant and loss tangent value become worse after surface coating treatment of PMI foam.This study provides guidance for the selection of PMI foam for electronic equipment.

关 键 词：PMI泡沫 表面覆膜处理 吸水性 透波率 介电常数 损耗角正切值 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]