本論文之主題在製備聚醯亞胺-黏土奈米複合材料及其介電特性之探討;首先將無機蒙脫土以陽離子交換法改質為有基蒙脫土後,再與亞醯胺聚合物單體進行原位聚合反應於黏土層間、以製備一系列不同黏土含量之聚醯亞胺-黏土奈米複合材料。 利用不同黏土含量之聚醯亞胺-黏土奈米複合材料產物,對其無機層材料之特性作一些比較。以XRD之鑑定其分散以達到奈米級分散,TGA研判熱裂解溫度隨黏土增加裂解溫度增加,TEM探討表面型態,發現結晶狀況會因含黏土增加而增加,Clay loading-含黏土增加而吃水量減少,LCR meter 測量材料的介電係數、介電損失,隨黏土增加介電係數而降低。
This thesis focused on polyimide/Clay nanocmposities.At first, inorganic Motmorilltonite was made into organophilic Motmorilltonite by ion-exchange method. Monomers of Polyimide are mixed with clay in different ratio in order to synthesize polyimide/Clay nanocomposites. TGA/DSC , TEM , XRD Were employed to investigate the structure and characteristics of synthesized polyimide/Clay nanocomposites. Dielectric properties of these nanocomposites were measured by LCR meter from 30℃ to 150℃ at frequencies of 1KHz to 1MHz. It was found that dielectric constant decreased at higt temperature and high clay content.