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

Number of Access:492（2025-08-28 23:13 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/100973

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Title
Biomass-derived poly(lactic acid) and poly(3-methyl-1,5-pentanediol sebacate) alternating multiblock copolymers with improved marine biodegradability and mechanical properties
Creator
CreatorName
Takagi, Atsuki
NRID
1000010757678 1000010757678
ORCID
0000-0002-4533-7200 0000-0002-4533-7200
researchmap permalink
yuihsu yuihsu
Scopus Author ID
55389981500 55389981500
CreatorName
Hsu, Yu I.
NRID
1000070203594 1000070203594
ORCID
0000-0002-8587-2507 0000-0002-8587-2507
researchmap permalink
read0168389 read0168389
Scopus Author ID
7102108908 7102108908
CreatorName
Uyama, Hiroshi
Subject
Biodegradable
Biomass
Copolymer
Marine biodegradable
Poly(lactic acid) (PLA)
Sebacic acid
Description
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.
Abstract
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.
Publisher
Elsevier Ltd
Source Title
Polymer Degradation and Stability
Volume (Issue)
236
Page
111301
Date of Issued
2025-06-01
Language
English
Handle URL
https://hdl.handle.net/11094/100973
PISSN
01413910
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.polymdegradstab.2025.111301
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article