研究生: |
Minh Chau Truong Minh - Chau Truong |
---|---|
論文名稱: |
Synthesis Polylactide with Varying Molecular Weights Synthesis Polylactide with Varying Molecular Weights |
指導教授: |
游進陽
Chin-Yang Yu |
口試委員: |
施劭儒
Shao-Ju Shih 堀江正樹 Masaki Horie |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2014 |
畢業學年度: | 102 |
語文別: | 英文 |
論文頁數: | 99 |
中文關鍵詞: | Polylactide 、ring-opening polymerization 、stannous octanoate |
外文關鍵詞: | Polylactide, ring-opening polymerization, stannous octanoate |
相關次數: | 點閱:118 下載:0 |
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In this thesis, polylactide with various molecular weights and molecular weight distributions were synthesized by solution ring opening polymerization. Molecular weight was controlled by varying the ratio of L-lactide monomer to palmityl alcohol initiator and tin(II) octanoate was used as a catalyst for precise control over molecular weight. Anhydrous toluene was used as a non-reactive solvent to prevent the contamination of catalyst. Besides, we also try to obtain the standard molecular weight of PLA (greater than 100,000 g/mol) to compare with commercial PLAs. Properties of different molecular weights of PLA were characterized by gel permeation chromatography, thermogravimetric analysis, differential scanning calorimety, and 1H NMR spectroscopy.
In this thesis, polylactide with various molecular weights and molecular weight distributions were synthesized by solution ring opening polymerization. Molecular weight was controlled by varying the ratio of L-lactide monomer to palmityl alcohol initiator and tin(II) octanoate was used as a catalyst for precise control over molecular weight. Anhydrous toluene was used as a non-reactive solvent to prevent the contamination of catalyst. Besides, we also try to obtain the standard molecular weight of PLA (greater than 100,000 g/mol) to compare with commercial PLAs. Properties of different molecular weights of PLA were characterized by gel permeation chromatography, thermogravimetric analysis, differential scanning calorimety, and 1H NMR spectroscopy.
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