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Remarkable diastereomeric effect on thermoresponsive behavior of polyurethane based on lysine and tartrate ester derivatives
http://hdl.handle.net/10061/0002000734
http://hdl.handle.net/10061/00020007343099196c-6c41-4928-8f6f-6f589c53ea19
| 名前 / ファイル | ライセンス | アクション |
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| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||
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| 公開日 | 2025-01-14 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Remarkable diastereomeric effect on thermoresponsive behavior of polyurethane based on lysine and tartrate ester derivatives | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ | journal article | |||||||||||
| アクセス権 | ||||||||||||
| アクセス権 | open access | |||||||||||
| 著者 |
Aoki, Daisuke
× Aoki, Daisuke
× Miyake, Akihiro
× Tachaboonyakiat, Wanpen
× 網代, 広治 |
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | This study describes the long-distance diastereomeric effect on thermoresponsive properties in water-soluble diastereomeric polyurethanes (PUs) composed of an L-lysine ethyl ester diisocyanate and a trimethylene glycol L-/D-tartrate ester, which have differences in spatial arrangements of the ethyl esters in the mirror image. The PUs based on L-lysine and L-/D-tartrate ester, named L-PU and D-PU, were synthesized with various number average molecular weights from 4700 to 13$2006100. In turbidimetry, L-PU showed a steep phase transition from 100%T to 0%T within about 10 °C at 4 g L$22121, whereas D-PU did not change completely to 0%T transmittance even at 80 °C at 4 g L$22121. In addition, the thermoresponsive properties of L-PU were less affected by concentration than those of D-PU. This long-distance diastereomeric effect on thermoresponsive behavior between L-PU and D-PU appeared in common among 6 samples with 4700 to 13$2006100 number average molecular weight. In the dynamic light scattering experiments at each transmittance, the hydrodynamic diameter (Dh) of l-PU increased up to 1000 nm, while the Dh of D-PU remained almost at 200$2013300 nm. The C[double bond, length as m-dash]O stretching vibration of FT-IR spectra showed that D-PU has more hydrogen-bonded ester groups than L-PU. Thus, we speculated that the difference in the retention of polymer chains in the micelle to promote intermicellar bridging generates the long-distance diastereomeric effect. | |||||||||||
| 書誌情報 |
en : RSC Advances 巻 11, 号 56, p. 35607-35613, 発行日 2021-11-03 |
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| 出版者 | Royal Society of Chemistry | |||||||||||
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| 収録物識別子タイプ | EISSN | |||||||||||
| 収録物識別子 | 2046-2069 | |||||||||||
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| 関連タイプ | isIdenticalTo | |||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | https://doi.org/10.1039/D1RA05877K | |||||||||||
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| 関連タイプ | isIdenticalTo | |||||||||||
| 識別子タイプ | URI | |||||||||||
| 関連識別子 | https://pubs.rsc.org/en/content/articlelanding/2021/ra/d1ra05877k | |||||||||||
| 権利 | ||||||||||||
| 権利情報Resource | http://creativecommons.org/licenses/by/3.0/ | |||||||||||
| 権利情報 | $00A9 2021 The Author(s). This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. | |||||||||||
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| 出版タイプ | VoR | |||||||||||
