研究生: |
劉明政 Ming-Cheng Liu |
---|---|
論文名稱: |
改質矽酸奈米顆粒對環氧樹脂/SiO2混成材料結構及性質探討 The Effect of Modified Polysilicic Acid on the Structure and Properties of Epoxy/ SiO2 hybrids |
指導教授: |
許應舉
Ying-Gev Hsu |
口試委員: |
陳信龍
none 洪伯達 Po-Da Hong |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 89 |
中文關鍵詞: | 奈米顆粒 、環氧樹脂 |
外文關鍵詞: | CLNs, IPNs |
相關次數: | 點閱:498 下載:7 |
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將聚矽酸奈米顆粒 (polysilicic acid nanoparticles, PN)表面之矽醇基(Si-OH)與含有矽氧烷類基團【-Si(OR)3】的改質劑(modifier)-3-glycidoxypropyltrimethoxysilane (GPTS)及3-(trimethoxysilyl) propyl- methacrylate (TPA)進行反應,將PN顆粒表面改質成含有-CH-CH2及-C-C(CH3)=CH2基團之改質PN,並分別以G-PN與T-PN稱之。
G-PN及T-PN分別與環氣樹脂DGEBA(diglycidyl ether bisphenol A)、硬化劑MDA(4,4’-methylenedianiline)混合均勻,並調配成透明之粘稠液(分別以G-epoxy和T-epoxy稱之)。G-epoxy 與T-epoxy在熱硬化處理後,形成之有機-無機混成材料為架橋結構(cross-linked networks, CLNs);然而,T-epoxy在BPO(benzoyl peroxide)的存在下,經熱處後,則形成有機無機相互穿梭網絡結構(interpenetrating networks, IPNs)。以各種儀器如FT-IR、DSC、TMA、SAXS、DMA、分析材料之相間作用力、微細構造、彎曲模數、動態機械與熱性質,並進而評估材料結構對硬化收縮及內應力之影響。實驗結果發現,相較於CLNs結構,IPNs結構之混成材料具有較低的硬化收縮率及內應力,且在不犠牲材料Tg的情況下有更好的機械性質。
The 3-glycidoxypropyltrimethoxysilane (GPTS) and 3-(trimethoxysilyl) propyl- methacrylate (TPA) modified polysilicic acid nanoparticles (PN), G-PN and T-PN, were mixed, respectively, with the solution of DGEBA and 4,4’-methy-lenedianiline (MDA), DGEBA/MDA, to prepare homo- -geneous resins called, G-epoxy and T-epoxy. When G-epoxy and T-epoxy were heat cured, they crosslinked, respectively, with the matrix, DGEBA/MDA, to afford the hybrids, DGEBA/MDA/G-PN and DGEBA/MDA/T-PN, of cross-linked networks (CLNs) structures. However, when T-epoxy was heated in the presence of peroxide (e.g., BPO), the structure of the cured hybrid, DGEBA/MDA/T-PN-B, became an structure of interpenetrating networks (IPNs). It was found that the DGEBA/MDA/T-PN-B hybrid of IPN structure had lower curing shrinkage and internal stress than that of the cured DGEBA/MDA and DGEBA/MDA/T-PN and DGEBA/MDA/G-PN hybrids of CLNs structure without sacrificing the Tg ,thermal ,and mechanical properties of the material.
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