Biomass-derived poly(lactic acid) and poly(3-methyl-1,5-pentanediol sebacate) alternating multiblock copolymers with improved marine biodegradability and mechanical properties

Takagi, Atsuki; Hsu, Yu I.; Uyama, Hiroshi

Polymer Degradation and Stability, 2025, 236, 111301

アクセス数:483件（2025-08-14 19:30 集計）

固定URL: https://hdl.handle.net/11094/100973

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タイトル
Biomass-derived poly(lactic acid) and poly(3-methyl-1,5-pentanediol sebacate) alternating multiblock copolymers with improved marine biodegradability and mechanical properties
著者
著者名
Takagi, Atsuki
NRID
1000010757678 1000010757678
ORCID
0000-0002-4533-7200 0000-0002-4533-7200
researchmap permalink
yuihsu yuihsu
Scopus Author ID
55389981500 55389981500
著者名
Hsu, Yu I.
NRID
1000070203594 1000070203594
ORCID
0000-0002-8587-2507 0000-0002-8587-2507
researchmap permalink
read0168389 read0168389
Scopus Author ID
7102108908 7102108908
著者名
Uyama, Hiroshi
キーワード等
Biodegradable
Biomass
Copolymer
Marine biodegradable
Poly(lactic acid) (PLA)
Sebacic acid
内容
Takagi A., Hsu Y.I., Uyama H.. Biomass-derived poly(lactic acid) and poly(3-methyl-1,5-pentanediol sebacate) alternating multiblock copolymers with improved marine biodegradability and mechanical properties. Polymer Degradation and Stability 236, 111301 (2025); https://doi.org/10.1016/j.polymdegradstab.2025.111301.
抄録
The reliance on fossil resources and the mismanagement of waste owing to the rapid increase in plastic production have led to serious environmental problems, particularly global marine pollution. In recent years, poly(lactic acid) (PLA) has been widely used as a biomass plastic to replace petroleum-based materials. However, the biodegradation of PLA is limited to composting environments and its brittle nature limits its application. This study aimed to synthesize a biomass-based PLA and poly(3-methyl-1,5-pentanediol sebacic acid) (PMPDSe)-diol copolymer and evaluate its marine biodegradability and mechanical properties. PLA was copolymerized with PMPDSe-diol to obtain the triblock copolymer PLA-PMPDSe-PLA, which was then chain-extended with hexamethylene diisocyanate to form an alternating multiblock (PLA-alt-PMPDSe) copolymer. Because of their regular arrangement, the thermal and mechanical properties could be controlled by varying the length of the PLA chains, compared with random multiblock (PLA-ran-PMPDSe) copolymers. In particular, when 61 % or 71 % PLA was included, the films had higher elongation at break (331 %–518 %) and toughness than PLA and PLA-ran-PMPDSe copolymers. Biodegradability was the highest when 54 % PLA was used, and the films disintegrated in compost and seawater. In seawater, the molecular weight decreased to 45 % in three months, and the biodegradability was confirmed to be >17 % in two months. Furthermore, the PLA-alt-PMPDSe copolymer exhibited a contact angle of over 83°, which is equivalent to that of PLA and could be used as a film. This polymer has a wide range of applications and will contribute to the development of sustainable bioplastics and address plastic waste.
出版者
Elsevier Ltd
収録物名
Polymer Degradation and Stability
巻(号)
236
ページ
111301
刊行年月
2025-06-01
言語
英語
ハンドルURL
https://hdl.handle.net/11094/100973
PISSN
01413910
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1016/j.polymdegradstab.2025.111301
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article