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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 廖文彬 | |
| dc.contributor.author | Han-Yun Chang | en |
| dc.contributor.author | 張漢耘 | zh_TW |
| dc.date.accessioned | 2021-06-15T04:44:35Z | - |
| dc.date.available | 2012-08-12 | |
| dc.date.copyright | 2010-08-12 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-08-09 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/45680 | - |
| dc.description.abstract | 本研究主要探討不同末端基的聚乙二醇(PEG)對聚乳酸(PLLA)/PEG系統之相容性及結晶動力學的影響。聚乳酸在結晶時，會在較高的結晶溫度下形成排列較緊密的α晶體結構；在較低的結晶溫度下，形成排列相對較鬆散的α’晶體結構；而在這之間的溫度下，則形成兩相共存的晶體結構。我們將PEG摻入PLLA中，改變玻璃轉移溫度及平衡熔點，利用POM、DSC、XRD觀察其結晶動力學的模式與熱力學參數間的關係，尤其著重在兩相共存區的影響，最後我們也發現這共存區的結構是由兩相透過動力學模式互相競爭而形成。
另外，我們也摻入了PEG-2NH2、PEG-2OH、PEG-2CH3三種不同末端基的PEG，對PLLA/PEG系統進行觀察。不同末端基的PEG與PLLA具有不同的相互作用力，除了改變玻璃轉移溫度及平衡熔點外，也改變了結晶時晶片的摺疊鏈端表面自由能，因此間接影響到PLLA/PEG系統的結晶動力學。 | zh_TW |
| dc.description.abstract | This study focused on the misbility and crystallization kinerics which effected by different end groups of polyethylene glycol (PEG) to poly lactic acid (PLLA) / PEG system. PLLA has ordered α structure which is close at higher crystallization temperature, and relatively loosely in α ' structure at low crystallization temperature. PLLA in PEG incorporation we will change the thermodynamics of the glass transition temperature and equilibrium melting point, using POM, DSC, XRD to observe the relationship between crystallization kinetics model and thermodynamic parameters, especially emphasis on the bouble structure coexistence phase. We also found that the structure is a crystallization kinetic model of two competing growth.
In addition, PLLA were also blended with PEG-2NH2, PEG-2OH, PEG-2CH3, three different end groups of PEG to observe the PLLA / PEG system. Different end groups of PEG and PLLA have different misbility, in addition to changing the glass transition temperature and equilibrium melting point, but also changes the crystallization of the surface free energy of chain folding, thus indirectly affecting the crystallization kinetics of PLLA / PEG system. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T04:44:35Z (GMT). No. of bitstreams: 1 ntu-99-R97549018-1.pdf: 7107542 bytes, checksum: 3cdf1ba9f42f8c3cd188b9a95f90f6a7 (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | 第一章 緒論 1
第二章 文獻回顧與理論 3 2-1 聚乳酸簡介 3 2-1-1 生物可分解高分子簡介 3 2-1-2 聚乳酸的合成與應用 5 2-1-3 聚乳酸的結晶結構 6 2-2 高分子等溫結晶理論 12 2-2-1 高分子總體結晶 13 2-2-2 Hoffman-Lauritzen Theory 17 2-3 PLLA聚摻合物的相容性及結晶行為 22 第三章 實驗 25 3-1 實驗材料與摻合物製備 25 3-2 實驗儀器 26 3-3 實驗方法 28 3-3-1等溫結晶(isothermal crystallization)的量測 28 3-3-2 球晶成長速率的量測 28 3-3-3 廣角X光繞射分析 29 第四章 結果與討論 31 4-1相容性與熱力學行為 31 4-1-1玻璃轉移溫度量測 31 4-1-2平衡熔點量測 33 4-1-3相容性 36 4-1-4 PLLA/PEG作用力 38 4-2 PLLA/PEG聚摻合物結晶性質(POM) 42 4-2-1結晶型態 42 4-2-2球晶成長速率 50 4-3等溫結晶放熱與熔化吸熱曲線分析 (DSC) 59 4-3-1 PLLA/PEG等溫結晶放熱 59 4-3-2 PLLA/PEG等溫結晶後的轉換與熔化峰討論 60 4-4結晶結構分析 75 4-4-1不同溫度等溫結晶 75 4-4-2 結晶成長機制分析(XRD) 82 第五章 總結 93 參考文獻 95 | |
| dc.language.iso | zh-TW | |
| dc.subject | 聚乳酸 | zh_TW |
| dc.subject | 結晶結構 | zh_TW |
| dc.subject | 結晶動力學 | zh_TW |
| dc.subject | 聚乙二醇 | zh_TW |
| dc.subject | crystallization kinetics | en |
| dc.subject | crystal structure | en |
| dc.subject | PLLA | en |
| dc.subject | PEG | en |
| dc.title | 聚乙二醇末端基對聚乳酸多晶相的結晶動力學的影響 | zh_TW |
| dc.title | End-Group Effect of PEG on Polymorphic Crystallization Kinetics of PLLA | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 邱文英,張光偉 | |
| dc.subject.keyword | 聚乳酸,聚乙二醇,結晶動力學,結晶結構, | zh_TW |
| dc.subject.keyword | PLLA,PEG,crystallization kinetics,crystal structure, | en |
| dc.relation.page | 99 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2010-08-09 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 高分子科學與工程學研究所 | zh_TW |
| 顯示於系所單位： | 高分子科學與工程學研究所 | |
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