Preparation and Characterization of Cyclo Olefin Copolymer (COC) Filled with Silica Nanoparticles

COC/SiO2奈米複合材料之製備與特性研究

歐珍方(Cheng-Fang Ou) ； 王啟鴻(Chi-Hung Wang)

《永達學報》 9卷2期 (2009/12) Pp. 88-98

https://doi.org/10.30179/BYTITC.200912.0008

摘要

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。

關鍵字

複合材料 ； 奈米粒子 ； 玻璃轉移溫度 ； 阻水性

並列摘要

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.

並列關鍵字

Composite ； Nanoparticle ； Glass Transition Temperatures ； Water permeability