| Item type |
デフォルト(1) |
| 公開日 |
2025-05-21 |
| タイトル |
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タイトル |
Origin of the Two Major Types of Repeating Units in Poly(β-pinene) Obtained by Cationic Polymerization |
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言語 |
en |
| 作成者 |
Ajala, Oluwaseyi Aderemi
Nakaichi, Shogo
Oshiki, Toshiyuki
Nakayama, Yuushou
Shiono, Takeshi
Tanaka, Ryo
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| アクセス権 |
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アクセス権 |
embargoed access |
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アクセス権URI |
http://purl.org/coar/access_right/c_f1cf |
| 権利情報 |
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言語 |
en |
|
権利情報 |
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.macromol.4c01663 |
| 権利情報 |
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言語 |
en |
|
権利情報 |
This is not the published version. Please cite only the published version. |
| 権利情報 |
|
|
言語 |
ja |
|
権利情報 |
この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。 |
| 内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
β-pinene is a very reactive substrate that isomerizes rapidly in the presence of protic catalysts and polymerizes in the presence of Lewis acid catalysts and initiators. Because of the sustainable perspective and high reactivity, precise polymerization of β-pinene has been given great attention, but limited examples of microstructure analyses have been done. Here, we comprehensively characterized the 1,3-cyclohexenyl sequence besides the conventional 1,4-cyclohexenyl sequence by various NMR techniques. The structure was confirmed by comparing NMR spectra with those of separately synthesized poly(β-phellandrene). The ratio of 1,3-sequence was increased in the polymer obtained at a lower temperature, in a more polar solvent, or by using a stronger Lewis acid catalyst. Considering the result of the theoretical study, a thermodynamically stable allyl cation that gives the 1,3-cyclohexenyl sequence would more frequently be formed when the ion pair recombination of the carbocation and counteranion during the polymerization is less frequent. The microstructure change affected the thermal property of poly(β-pinene); that is, more 1,4-cyclohexenyl sequence raised the glass transition temperature of the polymer. |
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言語 |
en |
| 内容記述 |
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内容記述タイプ |
Other |
|
内容記述 |
This work was supported by Kyoto Technoscience Center. |
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言語 |
en |
| 出版者 |
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出版者 |
American Chemical Society |
|
言語 |
en |
| 日付 |
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|
日付 |
2025-09-25 |
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日付タイプ |
Available |
| 言語 |
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|
言語 |
eng |
| 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 |
| 出版タイプ |
|
|
出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 関連情報 |
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|
関連タイプ |
isVersionOf |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
https://doi.org/10.1021/acs.macromol.4c01663 |
| 書誌情報 |
en : Macromolecules
巻 57,
号 19,
p. 9257-9264,
発行日 2024-09-25
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| 備考 |
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言語 |
en |
|
値 |
The full-text file will be made open to the public on 25 September 2025 in accordance with publisher's 'Terms and Conditions for Self-Archiving' |
Macromolecules_57_9257.pdf (1.4 MB)
