文化大學機構典藏 CCUR:Item 987654321/20166
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    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/20166


    题名: 乙烯酯/奈米二氧化矽之有機無機複合材料之研究
    作者: 廖崇宇
    贡献者: 材料科學與奈米科技研究所
    关键词: 二氧化矽
    乙烯酯
    奈米複合材料
    日期: 2010
    上传时间: 2011-11-02 15:13:52 (UTC+8)
    摘要: 本研究利用塊狀聚合法來製備乙烯酯(vinyl ester)/二氧化矽(nano silica)之奈米複合材料，製備時以不同含量重量百分比之二氧化矽進行聚合，實驗中除比較添加不同含量二氧化矽的乙烯酯，另外探討直接添加未經改質的奈米二氧化矽(non-modified SiO2)和加入以MPS改質的奈米二氧化矽(modified SiO2)之靜態機械性質(抗張強度與模數、耐衝擊強度和硬度)、動態機械性質(DMA)、熱性質(TGA、DSC)及物理性質是否提昇與改質的奈米二氧化矽性質程度差異。
    研究結果得知，經由傅立葉紅外線光譜(FTIR)分析，證實奈米二氧化矽已成功改質。以XRD觀察乙烯酯/二氧化矽奈米複合材料，顯示改質前後的二氧化矽並不會改變其結晶型態。以SEM觀察改質對奈米二氧化矽與乙烯酯之間的結合力差異，得知改質過二氧化矽與乙烯酯結合性較佳。機械性質方面，得知複合材料的抗張強度和耐衝擊強度測試皆會隨者奈米二氧化矽的添加變硬變脆而下降，導致未改質二氧化矽的機械性質優於改質的二氧化矽。動態機械性質方面，Tg點隨者添加量的上升而上升。在熱性質方面，隨著奈米二氧化矽添加量的增加，耐熱性效果提升更為顯著。

    In this stady we use bulk polymerization to produce nanocomposites of vinly ester / nano silica. The synthesis of nanocomposites materials include vinyl ester, and nano silica (include non-modify and modify). To investigate the improvement on the static mechanical and physical properties, dynamic mechanical analyzer (DMA), heat properties of vinly ester / nano silica nanocomposites. The static mechanical properties include tensile strength and modulus, impact strength and hardness. In the heat properties include thermogravimetric analyzer (TGA) and different scanning calorimeter (DSC).
    Different functional groups were grafted on the titanium oxide by Fourier transform infrared spectrometer (FTIR). The crystal structure of vinly ester / nano silica nanocomposites was determined at XRD and has no significant peak as that of pure vinly ester. It is observed that the modification influenced bound force between vinyl ester and nano silica by SEM, and discove modified nano silica best than non-modified nano silica of associativity. In the mechanical properties, the results had been down for tensile strength and impact strength because the Material has been Stiffening and Changes crisp. The non-modified nano silica was better than modified nano silica in the vinly ester / nano silica nanocomposites. The glass transition (tan δ peak) had been up, when vinyl ester filled of nano silica. In the heat properties, concentration of nano silica was refledted in amarked increase of heat-resistant.
    显示于类别:[化學工程與材料工程學系暨碩士班] 博碩士論文

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