| Item type |
文献 / Documents(1) |
| 公開日 |
2024-03-21 |
| 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/10.1039/D3RA03751G |
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|
言語 |
ja |
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|
関連名称 |
10.1039/D3RA03751G |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| タイトル |
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|
タイトル |
Polythioethers bearing side groups for efficient degradation by E1cB reaction : reaction design for polymerization and main-chain scission |
|
言語 |
en |
| 著者 |
川谷, 諒
ハギワラ, ケイト
タナカ, アンリ
コウサカ, ヤスヒロ
|
| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
We have previously reported the polycondensation by the tandem reactions of dithiols and α-(bromomethyl)acrylates, consisting of conjugate substitution (SN2′ reaction) and conjugate addition (Michael addition) reactions. The resulting polythioethers underwent a main-chain scission (MCS) by E1cB reaction, which is the reverse reaction of conjugate addition, although it was not quantitative due to the equilibrium. Herein, the modification of the structures of polythioethers led to irreversible MCS, whereby the β-positions of ester moieties were substituted with a phenyl group. This slight modification in the polymer structure influenced the monomer structures and polymerization mechanisms. The understanding of reaction mechanisms by model reactions was required to obtain high molecular weights of polythioethers. It was clarified that the consequent additions of 1,4-diazabicyclo[2.2.2]octane (DABCO), 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), and PBu3 were effective to achieve high molecular weight. The resulting polythioethers decomposed by irreversible MCS via E1cB reaction with DBU. |
|
言語 |
en |
| 書誌情報 |
en : RSC Advances
巻 13,
号 30,
p. 20782-20786,
発行日 2023-07-10
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| 収録物ID |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
20462069 |
| 出版者 |
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出版者 |
The Royal Society of Chemistry |
|
言語 |
en |
| 権利情報 |
|
|
言語 |
en |
|
権利情報 |
This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
| EID |
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|
識別子 |
405454 |
|
識別子タイプ |
URI |
| 言語 |
|
|
言語 |
eng |
rsca_13_30_20782.pdf (722 KB)
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