本研究將改質過的無機SiO2 奈米粉體，使用溶液混摻法摻入COC 基材製備COC/SiO2 奈米
複合材料，其目的在提高玻璃轉移溫度(Tg )，熱裂解溫度(Td )和提高水氣的阻隔性。利用示差
掃描卡計(DSC)和熱重分析儀(TGA)來鑑定其熱性質。利用紫外光/可見光光譜儀(UV-Vis)、水氣
透過率分析儀量測透光率、水氣透過率。以掃描式電子顯微鏡(SEM)觀察薄膜之斷裂面型態。
由DSC 和TGA 結果顯示添加改質過的SiO2，可提升複合材料之Tg 和Td ，分別提升了35.6℃
和15.9℃，以10 wt%與5 wt%提升效果最佳。複合材料之水氣透過率隨著SiO2 含量的增加而降
低，SiO2 含量10 wt%具最佳阻水效果，對水氣阻隔性提高了52.7 %。而透光率在SiO2 含量10 wt%
時皆維持在80 %以上。

A series of organic cyclo olefin copolymer (COC)/SiO2 composites, containing 1, 3, 5, 7, and 10 wt% SiO2 nanoparticles, were prepared by solution blending. Differential scanning calorimetry (DSC)indicated that the glass transition temperatures (Tg) of the composites were higher than that of the pure COC and rose with increasing SiO2 content. The composite with 10 wt% SiO2 exhibits the highest Tg.The decomposition temperatures (Td) of the composites were always higher than that of the pure COC.The light transmittance of the composites was still higher than 80% with up to 10 wt% SiO2. The water permeability of the composites decreased with increasing SiO2 content, and the 10 wt% SiO2 produced a composite with the maximum permeability decrease of 52.7%. Scanning electron microscopy (SEM) showed that finer silica was dispersed in the COC matrix without large agglomerates.