Enhanced degradation and gas barrier of PBAT through composition design of aliphatic units

被引：48
作者：
Hu, Han [1 ]
Tian, Ying [1 ]
Wang, Jinggang [1 ]
Zhang, Ruoyu [1 ]
Zhu, Jin [1 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Biobased Polymer Mat Technol & Applicat Z, Ningbo 315201, Zhejiang, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2022年 / 195卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Macromolecular design; Degradable copolyesters; Seawater degradation; Hydrolysis; Storage stability; POLY(BUTYLENE SUCCINATE); COPOLYESTERS; POLYESTERS; ACID; 2,5-FURANDICARBOXYLATE); CRYSTALLIZATION; MICROPLASTICS; POLYMERS; PLASTICS;
D O I：
10.1016/j.polymdegradstab.2021.109795
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Aliphatic-aromatic copolyesters are indispensable in degradable plastics, but their properties are limited by low strength and modulus, and slow degradation rates in natural environment. Herein, we report a novel molecular design method to prepare poly(butylene adipate-co-diglycolate-co-terephthalate)(PBADT) copolyesters. In detail, the aromatic unit is fixed at 50% molar content of butylene terephthalate (BT) units, while the aliphatic units are consisted of butylene adipate (BA) and butylene diglycolate (BD) units. The PBADT copolyesters have melting temperatures higher than 130 degrees C and manifest rapid crystallization, high elastic modulus (>129 MPa) and satisfied ductile tensile behavior (>770%). Their gas barrier performance and hydrophilicity all increase with increasing BD units. Compared with PEAT, faster hydrolysis and seawater degradation are observed, which is explained by the more hydrophilic structure of diglycolate. This work provides insights and direction for the development of high-performance yet environmentally degradable alternatives to conventional biodegradable aliphatic-aromatic polyesters. (C) 2021 Elsevier Ltd. All rights reserved.
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页数：10
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