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

Number of Access:141（2025-09-07 07:40 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/101383

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Title
Observing Depolymerization of a RAFT Polymer by Time-Resolved Small-Angle X ray Scattering
Creator
NRID
1000010794125 1000010794125
ORCID
0000-0003-2168-9436 0000-0003-2168-9436
researchmap permalink
takahashirintaro takahashirintaro
Scopus Author ID
7401848988 7401848988
CreatorName
Takahashi, Rintaro
NRID
1000010508203 1000010508203
CreatorName
Sugawara-Narutaki, Ayae
Subject
Depolymerization
Kinetics
Reversible addition−fragmentation chain-transfer polymerization
Time-resolved small-angle X-ray scattering
Unzipping
Description
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.
Abstract
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.
Publisher
American Chemical Society
Source Title
ACS Polymers Au
Volume (Issue)
5(2)
Page
129-133
Date of Issued
2025-02-13
Language
English
Handle URL
https://hdl.handle.net/11094/101383
eISSN
26942453
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1021/acspolymersau.4c00095
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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Category
学術雑誌論文 Journal Article