本研究嘗試以sol-gel方式製備水鋁礦(boehmite)批覆於alpha/theta晶型的氧化鋁(Alumina, Al2O3)表面，希望可藉由boehmite表面與矽烷耦合劑Methacryloxypropyltrimethoxysilane (MPS)的良好反應性，改善alpha/theta晶型氧化鋁之表面反應性。

另一研究為以矽烷耦合劑methoxysilane(MPS)對奈米級的氧化鋁粒子進行表面改質後，分別將氧化鋁與聚碳酸酯(bisphenol-A polycarbonate, PC)以熔融混鍊與溶液混摻方式進行混摻，進而研究比較不同混摻方式對之複材機械強度的影響。

TEM 結果顯示，本研究使用之sol-gel 實驗條件無法使氧化鋁alpha/theta晶型氧化鋁表面批覆boehmite。

由FT-IR與TEM結果顯示，MPS可成功改質奈米級gamma Al2O3之表面。由DSC結果顯示，水氣應會對溶液混掺之氧化鋁/PC複材的結晶造成影響。TGA結果顯示，不論熔融混鍊或是溶液混摻之氧化鋁/PC複材，Td(熱裂解5wt%之溫度)均隨氧化鋁添加量增加而下降，且改質後氧化鋁/PC複材的耐熱性均較改質前佳。以熔融混鍊之未改質氧化鋁/PC複材之耐熱性最差。以溶液混掺之氧化鋁/PC複材的韌性較熔融混掺複材佳。

In this research, we attempted to coat boehmite particles on surface of alpha/thata-Al2O3 particles by sol-gel route to improve surface reactivity of alpha/theta-Al2O3.

we also used nanoscale gamma-Al2O3 particles to react with Methacryloxypropyltrimethoxysilane(MPS).Surface-modified -Al2O3 particles were then blended with bisphenol-A polycarbonate(PC) by diffedent blending methods to prepare Al2O3/PC composites.In an tempt to study the influences of
different blending methods on mechanical properties of alumina/PC composite.

TEM results showed that alpha/theta-Al2O3 particles does not coat with boehmite particles by sol-gel method in this study.

The FT-IR and TEM results showed that gamma-Al2O3 could react with MPS successfully. DSC results showed that the moisture would cause crystallization of PC in solution-blending Al2O3/PC composite. TGA results showed that theramal degradation temperatures of both melt-blending and
solution-blending Al2O3/PC composites decreased with increasing Al2O3 contents. Tensile testing results showed that the toughness of Al2O3/PC composites prepared by solution-blending method was better than by melt-blenging method.

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