研究生: |
張容瑋 Rong-wei Chang |
---|---|
論文名稱: |
以RAFT活自由基聚合法合成用於不飽和聚酯樹脂之核殼型橡膠及無機/有機核殼型顆粒添加劑 Synthesis of Core-Shell Rubber and Inorganic/Organic Core-Shell Particle as Additives by RAFT Living Free Radical Polymerizations for Unsaturated Polyester 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: | 2008 |
畢業學年度: | 96 |
語文別: | 中文 |
論文頁數: | 84 |
中文關鍵詞: | 可逆加成-斷裂鏈轉移 、鏈轉移劑 |
外文關鍵詞: | reversible addition-fragmentation chain transfer, chain transfer agent |
相關次數: | 點閱:419 下載:1 |
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本文以可逆加成-斷裂鏈轉移之活自由基聚合作用(RAFT)合成不飽和聚脂的特殊添加劑,無機/有機核殼型顆粒(CSP),以減少聚合固化後之體積收縮,做為抗體積收縮劑。進行RAFT聚合法之前,吾人須先合成出具化學結構Z-C(=S)-S-R之鏈轉移劑,並以FTIR、1H-NMR及DSC對其進行鑑定,證實合成成功。
將鏈轉移劑BSPA接枝於無機之矽膠表面(即Si-BSPA)之後,再將Si-BSPA經由RAFT途徑聚合有機之丙烯酸甲酯單體,而產生均聚合物接枝於矽膠上,形成無機/有機核殼型顆粒(CSP)。反應過程中添加自由之鏈轉移劑在整個聚合作用期間可改善接枝聚合物之分子量及分子量分佈。
Synthesis of inorganic/organic core-shell particle (CSP) as low-profile additives for unsaturated polyester resins by RAFT living free radical polymerizations has been studied in this work. Before the RAFT polymerization, the chain transfer agent with a chemical structure of Z-C(=S)-S-R was synthesized first. The synthesized chain transfer agent was then characterized by using FTIR、1H-NMR and DSC to confirm its structure.
The chain transfer agent (CTA), namely, BSPA, was bonded onto the inorganic silica particles. The silica-supported BSPA was then used to mediate RAFT polymerization of methyl acrylate to produce homopolymer grafted silica, known as inorganic/organic core-shell particle (CSP). It was found that the introduction of a free CTA in solution during polymerization could significantly improve the control on molecular weight and polydispersity of grafted polymers.
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