Observing Depolymerization of a RAFT Polymer by Time-Resolved Small-Angle X ray Scattering

Takahashi, Rintaro; Sugawara-Narutaki, Ayae

ACS Polymers Au, 2025, 5(2), 129-133

アクセス数:141件（2025-09-07 03:38 集計）

固定URL: https://hdl.handle.net/11094/101383

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タイトル
Observing Depolymerization of a RAFT Polymer by Time-Resolved Small-Angle X ray Scattering
著者
NRID
1000010794125 1000010794125
ORCID
0000-0003-2168-9436 0000-0003-2168-9436
researchmap permalink
takahashirintaro takahashirintaro
Scopus Author ID
7401848988 7401848988
著者名
Takahashi, Rintaro
NRID
1000010508203 1000010508203
著者名
Sugawara-Narutaki, Ayae
キーワード等
Depolymerization
Kinetics
Reversible addition−fragmentation chain-transfer polymerization
Time-resolved small-angle X-ray scattering
Unzipping
内容
Takahashi R., Sugawara-Narutaki A.. Observing Depolymerization of a RAFT Polymer by Time-Resolved Small-Angle X ray Scattering. ACS Polymers Au 5, 129 (2025); https://doi.org/10.1021/acspolymersau.4c00095.
抄録
Recently, it has been reported that various polymethacrylates synthesized via reversible addition-fragmentation chain-transfer (RAFT) polymerization may be depolymerized by heating them to 120 °C in solution. However, insights into the mechanisms and kinetics remain limited. In this work, we monitored the depolymerization process of poly(benzyl methacrylate) in p-xylene using time-resolved small-angle X-ray scattering (SAXS). The results revealed that the weight-average molecular weight gradually decreased, while the z-average radius of gyration remained almost unchanged until approximately half of the repeating units were converted. This unexpected behavior could be well-reproduced by a kinetic model of end-to-end depolymerization (unzipping). This study provides the first direct observation of the structural evolution during depolymerization via an unzipping mechanism.
出版者
American Chemical Society
収録物名
ACS Polymers Au
巻(号)
5(2)
ページ
129-133
刊行年月
2025-02-13
言語
英語
ハンドルURL
https://hdl.handle.net/11094/101383
eISSN
26942453
関連情報 (isVersionOf)
DOI (出版社版)
https://doi.org/10.1021/acspolymersau.4c00095
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article