力化学作用的聚酰亚胺/二氧化硅固体合金的探索  

Study of Polyimide/SiO_2 Solid-state Alloy by the Mechanical Chemistry

作　　者：詹茂盛[1] 李建平[1] 

机构地区：[1]北京航空航天大学材料科学与工程系,北京100083

出　　处：《材料工程》2000年第10期22-24,28,共4页Journal of Materials Engineering

基　　金：航空基金资助!项目 :97G51 0 74

摘　　要：依据力化学作用原理 ,采用机械合金化工艺 ,在固态制备聚酰亚胺与二氧化硅的固体合金。通过扫描电镜对该固体合金的聚集态结构进行了观察与分析 ,发现该合金具有独特的微观形貌 ,聚集态结构与合金化时间有关 ;由动态粘弹性 (DMA)和红外光谱 (IR)分析表明 ,机械合金化工艺使高分子和二氧化硅陶瓷粉末之间通过力化学作用形成了牢固的相界面 ,从而提高了固体合金的储能模量和耐热温度。Polyimide (PI) /SiO 2 solid state alloy was produced by mechanical alloying process according to the principle of mechanical chemistry, and the microstructure was observed by SEM, which shows that after 600h ball milling the PI powders blend with ceramic powders homogeneously, and the ceramic powder cling to the side of PI powders Then the study on the content of each elements in the alloy tells that there exists a critical time to get a mechanical alloy As long as ball milling time gets to 600h ,the content of the blends is close to theoretical value, The samples were also analyzed by IR and DMA, and the result indicates that the strong interface between polymer and ceramic powders formed by chemical reaction in the mechanical process, which make the alloy a good thermomechanical properties

关 键 词：聚酰亚胺二氧化硅 固体合金 机械合金化 力化学 

分 类 号：TB321[一般工业技术—材料科学与工程] TB324