研究生: |
李家豪 CHIA-HAO Li |
---|---|
論文名稱: |
半批式壓克力乳化聚合反應及其抗電解質性能 Semibatch Emulsion Polymerizations of Acrylic Monomers and Their Performance in Resisting Externally Added Electrolytes |
指導教授: |
陳崇賢
Chorng-Shyan Chern |
口試委員: |
黃延吉
Bing-Joe Hwang 林析右 Shi-Yow Lin 許榮木 none |
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: | 79 |
中文關鍵詞: | 半批式乳化聚合反應 、乳漿安定性 、粒徑控制 、臨界凝聚濃度 、二階因次實驗設計 |
外文關鍵詞: | semibatch emulson polymerization, stability of latex, C.C.C(critical coagulation concerntration), 2-factorial experimental design |
相關次數: | 點閱:150 下載:3 |
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本論文主要是以半批式MMA/2-EHA乳化共聚合反應裝備高分子膠體,藉由加入Mg2+來觀察的乳漿粒子抗電解質性能。而乳漿粒子的安定性亦是本論文所要討論的重要課題之一。關於乳漿粒子抗電解質性部分,界面活性劑的用量對於乳漿的抗電解性影響最大,實驗結果顯示隨著非離子型界面活性劑Emuglen985在起始反應器進料濃度的增加,乳漿粒子的抗電解質性亦隨著提升,而當在單體進料中加入陰/非離子型界面活性劑CO-436時,雖然乳漿的抗電解質性亦有提升,但其效果並不顯著。對於乳漿粒子安定性方面,實驗結果顯示CO-436在乳化單體進料的濃度是最重要的因素,CO-436在乳化單體進料濃度高時,濾渣量就會減少。實驗結果亦顯示在高固成份時,乳漿粒子容易失去安定性,故本論文乃藉由各種不同實驗配方以及調整界面活性劑在起始反應器進料及單體進料的濃度,提高乳漿粒子的安定性及抗電解質性。
The objective of this work is to prepare polymer colloids via semi-batch MMA/2-EHA emulsion polymerization and observe the chemical stability of latexes toward added Mg2+ . The experimental results show that the chemical stability of latexes toward added electrolytes increases with increasing concerntration of Emuglen 985 in the initial reactor charge. The amount of total scraps decreases with increasing the concerntration of CO-436 in the monomer emulsion feed. Experimental results also show that the particles lose their stability rapidly at high solids contents. Both the concerntration of surfactants in the initial reactor charge and in the monomer feed play an important role in the chemical stability of the latex products.
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