研究生: |
平欣 Ping, Hsin |
---|---|
論文名稱: |
鈷金屬錯化物調控水相可控自由基聚合:從共軛單體到非共軛單體 Aqueous Cobalt-Mediated Radical Polymerization:From More-Activated Monomers to Less-Activated Monomers |
指導教授: |
彭之皓
Peng, Chi-How |
口試委員: |
王潔
Wang, Jane 陳俊太 Chen, Jiun-Tai |
學位類別: |
碩士 Master |
系所名稱: |
理學院 - 化學系 Department of Chemistry |
論文出版年: | 2019 |
畢業學年度: | 107 |
語文別: | 中文 |
論文頁數: | 71 |
中文關鍵詞: | 活性自由基聚合 、鈷調控自由基聚合 、水相鈷調控劑 、水溶性高分子材料 |
外文關鍵詞: | Living radical polymerization, Cobalt-mediated radical polymerization, Aqueous cobalt mediator, Water soluble material |
相關次數: | 點閱:1 下載:0 |
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活性/可控自由基聚合反應成功被應用在N-乙烯基吡咯烷酮的聚合反應,在本研究當中,成功合成出N,N-Bis(4-diethylaminosalicylidene)ethylene-diaminocobalt(II) (CoII(salen-NEt2))鈷金屬錯化合物作為調控劑,在40 ºC的純水中利用2,2'-Azobis[2-(2-imidazolin-2-yl)propane]dihydrochloride(VA-044)作為引發劑調控N-乙烯基吡咯烷酮的聚合反應,使分子量與轉化率成線性關係,分子量增長到37500,分子量分布係數介於1.2到1.3之間,並且利用優化過後的聚合反應條件拓展到其他單體的聚合反應,包含丙烯酸2-羥乙酯(HEA),N,N-二甲基丙烯醯胺(DMA)與丙烯酸(AA)。最終使用合成出來的PDMA短鏈在水中進行鏈增長反應,應證了良好的尾端官能基活性。
Controlled radical polymerization of N-vinylpyrrolidone (NVP) in water mediated by cobalt complex is reported. In this article, cobalt-mediated radical polymerization (CMRP) was successfully accomplished with N,N-Bis(4-diethylaminosalicylidene)ethylene-diaminocobalt(II) (CoII(salen-NEt2)) as mediator and VA-044 as the radical initiator at 40 ºC. Linear relationship of molecular weight and conversion was observed in water with molecular weights (MW) as high as 37500 and relatively narrow molecular weight distributions (PDI = 1.2−1.3). Furthermore, the monomer scope has grown to include Acrylic acid(AA), 2-hydroxyethyl acrylate(HEA), N,N-Dimethylacrylamide(DMA). Chain extension of the synthesized PDMA macroinitiator with DMA in water showed a clear shift in MWs, which indicated high retention of chain end functionality.
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