液晶环氧/BMI共聚物微观结构的研究  

Study on the microstructure of BMI/liquid crystalline epoxy copolymer

作　　者：陈立新[1] 王汝敏[1] 齐暑华[1] 徐亚洪[2] 廖建伟[2] 

机构地区：[1]西北工业大学化工系,陕西西安710072 [2]北京航空材料研究院,北京100095

出　　处：《航空材料学报》2002年第3期38-40,45,共4页Journal of Aeronautical Materials

基　　金：先进复合材料国防科技重点实验室基金资助(HK0 3 0 2 )

摘　　要：对 BMI与二元胺扩链后与液晶环氧 (PHBHQ)形成的共聚物的微观结构进行了分析。扫描电镜 (SEM)对共聚体系冲击断面的分析表明 ,当 BMI:DDBA=1∶ 1 ,1∶ 1 .5时 ,共聚体系为“皮—芯”结构 ;当 BMI:DDBA=1∶ 2时 ,共聚体系为“互穿网络”结构。广角 X射线衍射 (WAXD)和动态力学 (DMTA)的分析表明 ,BMI/BDAP/PHBHQ体系为均相体系 ,在固化网络中 ,PHBHQ形成取向有序的介晶域 ,对裂纹起到引发、分支。The copolymer microstructure of BMI with liquid crystalline epoxy (PHBHQ) after extending chain was observed. Through observation by Scanning Electron Microscope (SEM) showed when BMI:BDAP was equal from 1:1 or 1:1.5 to 1:2, the impact fracture surface was 'skin-core' and 'impenetrate network' structure respectively. The system of BMI/BDAP/PHBHQ was a uniform system analyzed by Dynamic Thermomechanical Analysis (DMTA). During curing the PHBHQ formed oriental ordered mesogenic domain analyzed by Wide-angle X-Ray Diffraction (WAXD) could initiate, branch, terminate the crack dispersed in the copolymer.

关 键 词：液晶环氧 共聚物 微观结构 介晶域 双马来酰亚胺 均聚物 

分 类 号：TB324[一般工业技术—材料科学与工程]