苯乙炔基封端PMR型聚酰亚胺树脂的制备与性能研究  

Preparation and Characterization of PMR-type Polyimide Resins Terminated with Phenylethynyl Group

作　　者：陈建升[1] 左红军[1] 高群峰[1] 何冠君[1] 范琳[1] 杨士勇[1] 

机构地区：[1]中国科学院化学研究所高技术材料实验室,北京100080

出　　处：《航空材料学报》2007年第5期66-70,共5页Journal of Aeronautical Materials

摘　　要：使用2,3,3,′4′-联苯四酸二酐、对苯二胺和反应性封端剂4-苯乙炔苯酐,采用单体原位反应聚合法制备了设计分子量为1500的PMR型聚酰亚胺树脂PEPA-15。PEPA-15树脂溶液具有良好的室温储存稳定性,我们使用AR-2000流变仪对树脂的熔体加工性能进行了初步测试,树脂经过371℃固化后显示了优异的热稳定性,T300碳纤维增强的复合材料经371℃后固化后在动态热机械分析测试(DMA)中在450℃前储能模量没有明显变化。The PMR-type polyimide resin PEPA-15 with calculated molecular weight of 1500 was prepared using 2,3,3＇,4＇-bipheny- ltetracarboxcylic anhydride （a-BPDA） , 4-phenylethynyl aniline （p-PDA） , and 4-phenylethynylphthalic anhydride （4-PEPA）. The PEPA-15 monomer solution has good stability at room temperature, and the melt processability of PEPA-15 molding powders and prepregs were characterized using AR-2000 rheometer. The polyimide resin cured at 371 ℃ showed excellent thermal stability, and after posteure at high temperature for 2 hours, the 3300 carbon fiber reinforced PEPA-15 composite exhibited no change of storage modulus before 450℃ in Dynamic Mechanical Analysis （DMA） test.

关 键 词：聚酰亚胺 PMR 苯乙炔基 热性能 加工性能 

分 类 号：TB324[一般工业技术—材料科学与工程]