研究生: |
劉家豪 Gu-Hao Liu |
---|---|
論文名稱: |
由元素矽水解法合成無機二氧化矽奈米顆粒及以RAFT 活自由基聚合法合成用於不飽和聚酯、乙烯基酯及環氧樹脂之奈米級無機二氧化矽/有機高分子核殼型顆粒添加劑 Synthesis of nano-scale colloidal silica from elemental silicon by hydrolysis, and synthesis of nano-scale inorganic silica/organic polymer core-shell particle as additives by RAFT living free radical polymerizations for unsaturated polyester, vinyl ester, and epoxy resins. |
指導教授: |
黃延吉
Yan-Jyi Huang |
口試委員: |
陳崇賢
Chorng-Shyan Chern 邱文英 Wen-Yen Chiu |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 化學工程系 Department of Chemical Engineering |
論文出版年: | 2011 |
畢業學年度: | 99 |
語文別: | 中文 |
論文頁數: | 130 |
中文關鍵詞: | 二氧化矽 、表面改質劑 、可逆加成-斷裂鏈轉移RAFT 、無機/有機核殼型顆粒(CSP) 、不飽和聚酯 、乙烯基酯 、環氧樹脂 、抗體積收縮性 、活高分子 |
外文關鍵詞: | Silica, modifier, Reversible Addition-Fragmentation Chain Transfer, inorganic/organic core-shell particle(CSP), unsaturated polyester (UP), vinyl ester resins (VER), and epoxy (EP), low-profile additives, living polymer |
相關次數: | 點閱:691 下載:0 |
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本文以元素矽水解法合成不同奈米及次微米粒徑的二氧化矽當作擔體,經由表面改質劑(4-(Chloromethyl)phenyltrimethoxysilane)改質之後,再利用可逆加成-斷裂鏈轉移之活自由基聚合作用(RAFT),在二氧化矽表面接枝高分子,形成無機/有機核殼型顆粒(CSP),可當成不飽和聚酯、乙烯基酯及環氧樹酯的特殊添加劑,以改善熱固性樹脂基材之物性,如抗體積收縮性質及機械性質。
CSP 的合成是以二氧化矽當做核心,再以具化學結構Z-C(=S)-S-R之RAFT 鏈轉移劑3-Benzylsulfanylthiocarbonylsufanylpropionic Acid (BSPA),接枝於先經苯甲氯表面改質後的二氧化矽(即Si-Cl),形成接枝鏈轉移劑之二氧化矽(Si-BSPA),再以Si-BSPA 為鏈轉移劑,經由RAFT溶液聚合 途徑聚合有機之丙烯酸甲酯單體,形成無機/有機核殼型顆粒(Si-PMA)。反應中的鏈轉移劑(BSPA)在RAFT聚合作用過程中會形成休眠基團,緩慢的進行聚合作用,可以控制接枝聚合物的分子量及分子量分佈,所得到之核殼顆粒之高分子外殼,並具活高分子(living polymer)之特性。
In the synthesis of the Si-PMA, the nano-scale colloidal silica was obtained by the hydrolysis of elemental silicon. Then silica was reacted with 4-(chloromethyl)phenyltrimethoxysilane to produce benzyl chloride functionalized silica(Si-Cl) first, followed by reacting with BSPA to make BSPA-grafted silica particle (Si-BSPA). Later, Si-BSPA can be use as a RAFT agent to make in Si-poly(methyl acrylate)(i.e. Si-PMA) via Reversible Addition-Fragmentation Chain Transfer (RAFT)
polymerization.
During RAFT polymerization, the CTA chain transfer agent would become a dormant specimen slows down which made the polymerization rate, so that the molecular weight and molecular weight distribution can be controlled. The Si-PMA has a characteristic of living polymer.
The synthesized Si-PMA, namely, inorganic/organic core-shell particle (CSP) can be employed as low-profile additives (LPA) for low-shrinkunsaturated polyester (UP), vinyl ester resins (VER), and
Epoxy (EP).
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