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Dual role for alkali metal cations in enhancing the low-temperature radical polymerization of N,N-dimethylacrylamide
https://tokushima-u.repo.nii.ac.jp/records/2008146
https://tokushima-u.repo.nii.ac.jp/records/2008146919c2ea4-2e29-451f-bcb7-90b163689693
| 名前 / ファイル | ライセンス | アクション |
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pc_6_11_2054.pdf (585 KB)
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| Item type | 文献 / Documents(1) | |||||||||||||||||||||||||||||||||||
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| 公開日 | 2020-09-11 | |||||||||||||||||||||||||||||||||||
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| アクセス権 | open access | |||||||||||||||||||||||||||||||||||
| 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 | |||||||||||||||||||||||||||||||||||
| 出版社版DOI | ||||||||||||||||||||||||||||||||||||
| 関連識別子 | https://doi.org/10.1039/C4PY01662A | |||||||||||||||||||||||||||||||||||
| 関連名称 | 10.1039/C4PY01662A | |||||||||||||||||||||||||||||||||||
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| 出版タイプ | AM | |||||||||||||||||||||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||||||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||||||||||||
| タイトル | Dual role for alkali metal cations in enhancing the low-temperature radical polymerization of N,N-dimethylacrylamide | |||||||||||||||||||||||||||||||||||
| 著者 |
平野, 朋広
× 平野, 朋広
WEKO
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× 齊藤, 達哉× クラノ, ヨシタカ
× ミワ, ヨウヘイ
× 押村, 美幸
WEKO
473
× 右手, 浩一
WEKO
239
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| 内容記述 | The radical polymerization of N,N-dimethylacrylamide (DMAAm) has been investigated in the presence of several alkali metal salts, including lithium bis(trifluoromethanesulfonyl)imide (LiNTf2). The addition of an alkali metal salt led to a significant increase in the yield and molecular weight of the resulting polymer. NMR analysis of mixtures of DMAAm and LiNTf2 suggested that DMAAm was being activated by the coordination of Li+ to its C=O group. Electron spin resonance analysis of the DMAAm polymerization in the presence of LiNTf2 suggested that the propagating radical was being stabilized by Li+ through a single-electron lithium bond, because a signal for the propagating radical of the acrylamide derivatives was observed for the first time in solution when LiNTf2 was added. Based on these results, we have proposed a mechanism for this polymerization, where the propagation steps occur between a lithium ion-stabilized propagating radical and a lithium ion-activated incoming monomer. Furthermore, polymers with a wide range of stereoregularities, such as isotactic, syndiotactic and heterotactic systems, were successfully prepared using this method by carefully selecting the appropriate combination of solvent and alkali metal salt. | |||||||||||||||||||||||||||||||||||
| 書誌情報 |
en : Polymer Chemistry 巻 6, 号 11, p. 2054-2064, 発行日 2015-01-07 |
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| 収録物識別子タイプ | ISSN | |||||||||||||||||||||||||||||||||||
| 収録物識別子 | 17599962 | |||||||||||||||||||||||||||||||||||
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| 出版者 | The Royal Society of Chemistry | |||||||||||||||||||||||||||||||||||
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| 識別子 | 289054 | |||||||||||||||||||||||||||||||||||
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| 言語 | eng | |||||||||||||||||||||||||||||||||||
