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Quantitative Evaluation of Photodegradation and Racemization of Poly(L-lactic acid) under UV-C Irradiation
http://hdl.handle.net/10228/00006750
http://hdl.handle.net/10228/00006750491ee88b-7cbc-48ec-9005-82f211f5347f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
j.polymdegradstab.2010.03.034.pdf (321.1 kB)
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| Item type | 学術雑誌論文 = Journal Article(1) | |||||||||||||
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| 公開日 | 2018-05-09 | |||||||||||||
| 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 | Quantitative Evaluation of Photodegradation and Racemization of Poly(L-lactic acid) under UV-C Irradiation | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 著者 |
Yasuda, Nobuhiko
× Yasuda, Nobuhiko× Wang, Yan× Tsukegi, Takayuki× 白井, 義人× 西田, 治男
WEKO
21961
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | To obtain details of poly(L-lactic acid) (PLLA) photodegradation behavior, PLLA films were irradiated by UV-C light (λ = 253.7 nm) to directly excite carbonyl groups, resulting in a rapid decrease in the molecular weight accompanying a gradual decrease in the optical purity of monomeric units in the chains. The racemization during the photodegradation was first detected as a result of the chain scission by irradiation. From quantitative analyses of the molecular weight and the monomeric unit composition, it was found that the chain scission ratio and the D-lactate unit ratio increased in parallel during the irradiation, suggesting that approximately one D-lactate unit formed for every chain scission. From a mechanistic consideration, the racemization equilibrium was proposed to occur at both carboxyl and hydroxyl chain ends. | |||||||||||||
| 書誌情報 |
Polymer Degradation and Stability 巻 95, 号 7, p. 1238-1243, 発行日 2010-04-02 |
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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.2010.03.034 | |||||||||||||
| 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) 2010 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 | photodegradation | |||||||||||||
| キーワード | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | racemization | |||||||||||||
| キーワード | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | Mark-Houwink-Sakurada parameter | |||||||||||||
| 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 | ||||||||||||||
| URL | https://hyokadb02.jimu.kyutech.ac.jp/html/397_ja.html | |||||||||||||
| 論文ID（連携） | ||||||||||||||
| 値 | 10219052 | |||||||||||||
| 連携ID | ||||||||||||||
| 値 | 6976 | |||||||||||||
