| 研究生: |
吳政龍 Wu, Cheng-lung |
|---|---|
| 論文名稱: |
以硫醇-己內醯胺起始系統合成團鏈共聚物並探討其自組裝型態 Studies on the self-assemble of block copolymers synthesized using thiol-caprolactam initiation system |
| 指導教授: |
陳志勇
Chen, Chuh-yung |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 化學工程學系 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: | 73 |
| 中文關鍵詞: | 雙成份起始系統 、自組裝 、團鏈共聚物 、分散劑 |
| 外文關鍵詞: | thiol-caprolactam initiation system, diblock copolymer, surfactant, self-assemble |
| 相關次數: | 點閱:106 下載:2 |
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本研究主要是以實驗室自行開發之硫醇-己內醯胺雙成份起始系統合成三種不同結構的團鏈共聚物。在合成的過程中,利用了目前相當熱門且準確率相當高的 Maldi-tof 質譜儀鑑定其尾端基結構,確定己內醯胺確實保護在高分子鏈末端,同時也以 GPC 測試高分子鏈分子量成長情況,證實此聚合法具有活性聚合的特徵。並以各種鑑定方式證實製備出 苯乙烯(St)-甲基丙烯酸甲酯(MMA)團鏈共聚物後,觀察產物是否具有相分離的情形發生。另也將其進行分散劑測試,測試在高分子混掺的系統中,是否可以提高其分散性,降低相分離的程度,並提高系統的穩定度。另一方面,在自組裝的系統中,分別改變了均聚物的比例、均聚物分子量以及團鏈共聚物分子鏈段比例,於不同的均聚物比例下會出現不同的自組裝型,而改變均聚物分子量以及團鏈共聚物分子鏈段比例則是會使得自組裝型態變得較小。在其它種類的團鏈共聚物 St-HEMA(2-hydrotheylene methacryalte) 系統中,於AFM 觀察其相分離的現象之外,亦測試了共溶劑對相分離的影響,於不同的溶劑比例下,便會產生不同的自組裝型態。最後,在St-GMA(glycidyl methacryalte)系統中,觀察其相分離的型態之外,也研究了polystyrene與polyglycidyl methacryalte混掺之後會產生柱狀結構的自組裝型態,並且再將團鏈共聚物加入系統中,則是會使得相分離的程度下降,使表面趨於平坦。
Three kinds of diblock copolymers had been successful synthesized by using the thiol-caprolactam initiation system in this thesis. The end-group of polymer chain protected by caprolactam was identified by Maldi-Tof Mass spectrum. From the GPC results, the molecular weight of polymer was increased with the reaction time, which was consistent with the living radical polymerization. The phase morphology of diblock copolymer and mixed with homopolymers were measured by AFM. The degree of phase separation was decreased due to the diblock copolymer added. Notable, the self-assemble of polymer was occurred in the ternary blend at specific ratio of polymer and diblock copolymer. In addition, the blend system of polystyrene and polyglycidyl methacrylate was also studied in this investigation. Interesting, the particular morphology of blend polymer was observed. One can used this particular morphology for some application when the polyglycidyl methacrylate was modified and linked the chelating group.
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