本實驗擬合成含羥基及懸掛芳香環二胺類4-4’-二胺基-4”-羥基三苯基甲烷(DHTM)和芳香族二酸酐3,3’4,4’-二苯甲酮四羧酸二酐(BTDA)、3,3’,4,4’-二苯醚四羧酸二酐(OPDA)及苯均四酸酐(PMDA)以溶液環化法合成可溶性聚醯亞胺。比較其機械性質、耐熱性質等物性。溶液-凝膠反應選擇(PMDA+DHTM)作為聚合物主體。加入二氧化矽以三種方式進行之，第一種方式為將預先配製好的四乙基矽烷氧(TEOS)、水及鹽酸的水解液直接加入聚合物溶液中；第二種方式以偶合劑3-甘油基丙基三甲基矽烷氧(GPTMOS)加入水解液，再將此混合入聚醯亞胺溶液中；第三種方式將偶合劑GPTMOS置入聚合物溶液中，預先反應形成偶合的聚合物前驅物，再將水解液加入反應。形成之複合溶液均以階段升溫的方式成膜，合成的複合薄膜以FT-IR分析其結構；以TGA、DSC及DMA測定其熱性質；SEM觀察其聚合物的形態，同時以萬能拉力機測定複合物的應力及模數，並以UV/vis測定透光性。比較此三種方式形成聚醯亞胺-二氧化矽奈米複合材料，以第三種方式為改善有機相與無機相相容性的最佳複合膜。

In this thesis, we will synthesis a diamine 4,4’diamino-4”-hydroxytri phenylmethane(DHTM) which contain a pendant phenyl group and a hydroxy group on it. A series of soluble polyimides will be synthesized from DHTM and aromatic dianhydrides such as 3,3’,4,4’-benzophenone tetracarboxylic dianhydride(BTDA)、4,4’-oxydiphthalic anhydride (OPDA) and pyrromellitic dianhydride (PMDA) via solution imidization method. Comparing with their mechanical and physical properties and selecting polymer PMDA+DHTM as polymer matrix in the sol-gel process. Adding silica nanoparticles into poly -mer matrix is carrying out in three kinds of way. First, preparing hydrolyzed solution which contain tetraethoxysilane(TEOS)、water and hydrochloride, then pour this hydrolyte into polymer solution. The second method is adding coupling agent 3-glycidoxypropyltrimethoxysilnae(GPTMOS) into hydro -lyzed solution, then pour this mixed solution into polymer solution. Third, couping agent could react with polymer solution to become a precursor first. Then hydrolyzed solution add into this precursor to form polymer gel. All these three hybrid solution are spin coating on glass substrate and gelation by step temperature raising. The final polymer nanocomposites will be subjected by FT-IR and element analysis to characterize the structure. The morphology will be investigated by SEM while the thermal properties will be measured by TGA DSC DMA. We will also study the mechanical properties by universal instron and the transparency of the hybrid film by UV/vis spectra. Comparing all the properties of these three kinds of hybrid flim, we find the third kind of nanocompostie exhibit the best properties due to the improvement of compatibility between polyimide and SiO2.

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