| Item type |
文献 / Documents(1) |
| 公開日 |
2021-05-20 |
| アクセス権 |
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アクセス権 |
open access |
| 資源タイプ |
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|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版社版DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1002/pola.20883 |
|
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言語 |
ja |
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|
関連名称 |
10.1002/pola.20883 |
| 出版タイプ |
|
|
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 |
Hydrogen-Bond-Assisted Stereocontrol in the Radical Polymerization of N-Isopropylacrylamide with Secondary Alkyl Phosphate : The Effect of the Bulkiness of the Ester Group |
|
言語 |
en |
| タイトル別表記 |
|
|
その他のタイトル |
Hydrogen-Bond-Assisted Stereocontrol in the Radical Polymerization of N-Isopropylacrylamide with Secondary Alkyl Phosphate : Effect of Bulkiness of Ester Group |
|
言語 |
en |
| タイトル別表記 |
|
|
その他のタイトル |
HYDROGEN-BOND-ASSISTED STEREOCONTROL |
|
言語 |
en |
| 著者 |
平野, 朋広
キタジマ, ヒロコ
イシイ, サトシ
妹尾, 真紀子
佐藤, 恒之
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| 抄録 |
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|
内容記述タイプ |
Abstract |
|
内容記述 |
Radical polymerization of N-isopropylacrylamide (NIPAAm) in toluene at low temperatures was investigated in the presence of triisopropyl phosphate (TiPP). The addition of TiPP induced a syndiotactic-specificity that was enhanced by lowering polymerization temperature, whereas atactic polymers were obtained in the absence of TiPP regardless of temperature. Syndiotactic-rich poly(NIPAAm) with racemo diad = 65% was obtained at –60°C with a fourfold amount of TiPP, but almost atactic poly(NIPAAm)s were obtained by lowering temperature to –80°C. This result contrasted with the result in the presence of primary alkyl phosphates, such as tri-n-propyl phosphate, that stereospecificity varied from syndiotactic to isotactic by lowering polymerization temperature. NMR analysis at –80°C revealed that TiPP predominantly formed 1:1 complex with NIPAAm, although primary alkyl phosphates preferentially formed 1:2 complex with NIPAAm. Thus, it was concluded that a slight increase in bulkiness of the added phosphates influenced the stoichiometry of the NIPAAm-phosphate complex at lower temperatures and consequently a drastic change in the effect on stereospecificity of NIPAAm polymerization was observed. |
|
言語 |
en |
| キーワード |
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|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
hydrogen bond |
| キーワード |
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|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
N-isopropylacrylamide |
| キーワード |
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|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
phosphate |
| キーワード |
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|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
radical polymerization |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
stereoregular polymers |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
stereospecific polymerization |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
syndiotactic |
| 書誌情報 |
en : Journal of Polymer Science Part A : Polymer Chemistry
巻 43,
号 17,
p. 3899-3908,
発行日 2005-07-18
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| 収録物ID |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0887624X |
| 収録物ID |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
10990518 |
| 収録物ID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA1068915X |
| 収録物ID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA11624127 |
| 出版者 |
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出版者 |
Wiley |
|
言語 |
en |
| 権利情報 |
|
|
言語 |
en |
|
権利情報 |
This is the peer reviewed version of the following article: Hirano, T., Kitajima, H., Ishii, S., Seno, M. and Sato, T. (2005), Hydrogen‐bond‐assisted stereocontrol in the radical polymerization of N‐isopropylacrylamide with secondary alkyl phosphate: The effect of the bulkiness of the ester group. J. Polym. Sci. A Polym. Chem., 43: 3899-3908., which has been published in final form at https://doi.org/10.1002/pola.20883. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
| EID |
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|
識別子 |
121262 |
|
識別子タイプ |
URI |
| 言語 |
|
|
言語 |
eng |
jpsa_43_17_3899.pdf (469 KB)
