請用此 Handle URI 來引用此文件：
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/81092完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 廖文彬(Wen-Bin Liau) | |
| dc.contributor.author | Sin-Ru Chih | en |
| dc.contributor.author | 池昕儒 | zh_TW |
| dc.date.accessioned | 2022-11-24T03:30:09Z | - |
| dc.date.available | 2021-09-17 | |
| dc.date.available | 2022-11-24T03:30:09Z | - |
| dc.date.copyright | 2021-09-17 | |
| dc.date.issued | 2021 | |
| dc.date.submitted | 2021-08-26 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/81092 | - |
| dc.description.abstract | "本研究主要探討聚乳酸(PLLA)介穩態形成的條件及其等溫冷結晶行為。我們利用開環聚合法合成出以分子量為 4,600 及 2,000 的聚乙二醇、乙二醇以及己二醇不同中間鏈段的聚乳酸三嵌段共聚物(triblock copolymer)，以聚乙二醇(PEG)做為塑化劑與共聚物混摻或已以足夠比例存在於共聚物內，改變玻璃轉移溫度，使得聚乳酸可以在更低的溫度形成介穩態，發現介穩態的形成僅與玻璃轉移溫度是否足夠低有關。當 DSC 升溫時觀察到在約 50 °C 及 100 °C 有單獨結晶放熱峰，或者 100 °C 放熱峰前有微量吸熱峰，即可判斷此系統有介穩態。我們以熱微差掃描分析儀及廣角 X 光散射儀觀察介穩態、α’結構以及α結構在等溫冷結晶時結構存在的溫度區間以及三者之間的共存關係。研究結果顯示，最低溫形成介穩態單一結構，較高溫會有一溫度區間為介穩態及α’結構共存，次高溫度區間為α’結構與α結構共存，最高溫度則為單一α結構。介穩態及α’結構共存時互為競爭關係。此外，本研究也探討已在低溫形成介穩態單一結構後，對於介穩態在各共存區持溫的結構變化，發現在介穩態及α’結構共存區介穩態並無變化，而在α’結構與α結構共存區，介穩態則會熔化再結晶形成α結構。" | zh_TW |
| dc.description.provenance | Made available in DSpace on 2022-11-24T03:30:09Z (GMT). No. of bitstreams: 1 U0001-1908202100410500.pdf: 5828706 bytes, checksum: 847ace50043f84855bcf867194e9c20c (MD5) Previous issue date: 2021 | en |
| dc.description.tableofcontents | "摘要 IV Abstract V 目錄 VI 圖目錄 VIII 表目錄 XII 第一章 緒論 1 第二章 文獻回顧 2 2-1 聚乳酸的生物分解性及其製造 2 2-2 高分子摻合物相容性 5 2-3 高分子結晶理論 8 2-4 聚乳酸結晶結構 13 第三章 實驗 17 3-1 實驗材料 17 3-2 實驗儀器 19 3-3 實驗方法 21 3-3-1 聚乙二醇/1,6-Hexanediol與左旋聚乳酸純化 21 3-3-2 左旋丙交酯（L-lactide）純化 21 3-3-3 聚乳酸-聚乙二醇-聚乳酸三嵌段共聚合物合成 22 3-3-4 聚乳酸-乙二醇-聚乳酸/聚乳酸-己二醇-聚乳酸 三嵌段共聚合物合成 24 3-3-5 共聚合物/左旋聚乳酸混摻物及共聚物/聚乙二醇混摻物製備 25 3-3-6 熱微差掃描分析儀（differential scanning calorimeter, DSC） 26 3-3-7 廣角 X 光散射儀（wide angle X-ray scattering, WAXS） 29 第四章 結果與討論 31 4-1 各系統性質分析 31 4-1-1 動態掃描升溫 32 4-1-2 平衡熔點 47 4-1-3 介穩態結晶鑑定 50 4-2 等溫結晶 57 4-3 介穩態的性質 74 第五章 結論 86 參考文獻 87 " | |
| dc.language.iso | zh-TW | |
| dc.subject | 聚乙二醇、 | zh_TW |
| dc.subject | 介穩態 | zh_TW |
| dc.subject | 聚乳酸 | zh_TW |
| dc.subject | 冷結晶 | zh_TW |
| dc.subject | 共聚物混摻 | zh_TW |
| dc.subject | 三嵌段共聚物 | zh_TW |
| dc.subject | block copolymer | en |
| dc.subject | PLLA | en |
| dc.subject | PEG | en |
| dc.subject | mesophase | en |
| dc.subject | cold crystallization | en |
| dc.subject | polymer blend | en |
| dc.title | 增塑聚乳酸介穩態的形成及其冷結晶行為 | zh_TW |
| dc.title | The mesophase formation of plasticized PLLA and its cold crystallization behavior. | en |
| dc.date.schoolyear | 109-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 羅世強(Hsin-Tsai Liu),童世煌(Chih-Yang Tseng),曾勝茂 | |
| dc.subject.keyword | 聚乳酸,聚乙二醇、,介穩態,冷結晶,共聚物混摻,三嵌段共聚物, | zh_TW |
| dc.subject.keyword | PLLA,PEG,mesophase,cold crystallization,polymer blend,block copolymer, | en |
| dc.relation.page | 95 | |
| dc.identifier.doi | 10.6342/NTU202102500 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2021-08-26 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 材料科學與工程學研究所 | zh_TW |
| 顯示於系所單位： | 材料科學與工程學系 | |
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