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Racemization Behavior of L,L-Lactide during Heating
http://hdl.handle.net/10228/00006762
http://hdl.handle.net/10228/0000676213dfc023-578b-4d70-9e8d-a5333ba9b3d5
名前 / ファイル | ライセンス | アクション |
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j.polymdegradstab.2007.01.009.pdf (248.6 kB)
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Item type | 学術雑誌論文 = Journal Article(1) | |||||||||||||||||
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公開日 | 2018-05-15 | |||||||||||||||||
資源タイプ | ||||||||||||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||
資源タイプ | journal article | |||||||||||||||||
タイトル | ||||||||||||||||||
タイトル | Racemization Behavior of L,L-Lactide during Heating | |||||||||||||||||
言語 | ||||||||||||||||||
言語 | eng | |||||||||||||||||
著者 |
Tsukegi, Takayuki
× Tsukegi, Takayuki× Motoyama, Toru× 白井, 義人
WEKO
8065
× 西田, 治男
WEKO
21961
× 遠藤, 剛 |
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抄録 | ||||||||||||||||||
内容記述タイプ | Abstract | |||||||||||||||||
内容記述 | To control the depolymerization process of poly (L-lactic acid) into L,L-lactide for feedstock recycling, the racemization of L,L-lactide as a post-depolymerization reaction was investigated. In the absence of a catalyst, the conversion to meso-lactide increased with increase in the heating temperature and time at a higher rate than the conversion into oligomers. The resulting high composition of meso-lactide suggests that the direct racemization of L,L-lactide had occurred in addition to the known racemization mechanism that occurs on the oligomer chains. In the presence of MgO, the oligomerization rapidly proceeded to reach an equilibrium state between monomers and oligomers. The equilibrium among L,L-, meso-, and D,D-lactides was found to be a convergent composition ratio: L,L-:meso-:D,D-lactides = 1:1.22:0.99 (wt/wt/wt) after 120 min at 300 °C. This composition ratio also indicates that, in addition to the known racemization reaction on the oligomer chains, direct racemization among the lactides is also a frequent occurrence. | |||||||||||||||||
書誌情報 |
Polymer Degradation and Stability 巻 92, 号 4, p. 552-559, 発行日 2007-01-14 |
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出版社 | ||||||||||||||||||
出版者 | Elsevier | |||||||||||||||||
DOI | ||||||||||||||||||
関連タイプ | isVersionOf | |||||||||||||||||
識別子タイプ | DOI | |||||||||||||||||
関連識別子 | https://doi.org/10.1016/j.polymdegradstab.2007.01.009 | |||||||||||||||||
ISSN | ||||||||||||||||||
収録物識別子タイプ | ISSN | |||||||||||||||||
収録物識別子 | 0141-3910 | |||||||||||||||||
著作権関連情報 | ||||||||||||||||||
権利情報 | Copyright (c) 2007 Elsevier Ltd. All rights reserved. | |||||||||||||||||
キーワード | ||||||||||||||||||
主題Scheme | Other | |||||||||||||||||
主題 | Poly(L-lactic acid) | |||||||||||||||||
キーワード | ||||||||||||||||||
主題Scheme | Other | |||||||||||||||||
主題 | L,L-lactide | |||||||||||||||||
キーワード | ||||||||||||||||||
主題Scheme | Other | |||||||||||||||||
主題 | Chemical recycling | |||||||||||||||||
キーワード | ||||||||||||||||||
主題Scheme | Other | |||||||||||||||||
主題 | Racemization | |||||||||||||||||
キーワード | ||||||||||||||||||
主題Scheme | Other | |||||||||||||||||
主題 | Ester–semiacetal tautomerization | |||||||||||||||||
出版タイプ | ||||||||||||||||||
出版タイプ | AM | |||||||||||||||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||||||||||
査読の有無 | ||||||||||||||||||
値 | yes | |||||||||||||||||
研究者情報 | ||||||||||||||||||
https://hyokadb02.jimu.kyutech.ac.jp/html/397_ja.html | ||||||||||||||||||
論文ID(連携) | ||||||||||||||||||
10037530 | ||||||||||||||||||
連携ID | ||||||||||||||||||
6982 | ||||||||||||||||||
資料タイプ | ||||||||||||||||||
内容記述タイプ | Other | |||||||||||||||||
内容記述 | Journal Article | |||||||||||||||||
著者所属 | ||||||||||||||||||
Molecular Engineering Institute, Kinki University 11-6 Kayanomori, Iizuka, Fukuoka 820-8555 Japan, Kyushu Institute of Technology 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka, 808-0196, Japan | ||||||||||||||||||
著者所属 | ||||||||||||||||||
Kyushu Institute of Technology 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka, 808-0196, Japan | ||||||||||||||||||
著者所属 | ||||||||||||||||||
Kyushu Institute of Technology 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka, 808-0196, Japan | ||||||||||||||||||
著者所属 | ||||||||||||||||||
Molecular Engineering Institute, Kinki University 11-6 Kayanomori, Iizuka, Fukuoka 820-8555 Japan | ||||||||||||||||||
著者所属 | ||||||||||||||||||
Molecular Engineering Institute, Kinki University 11-6 Kayanomori, Iizuka, Fukuoka 820-8555 Japan |