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Biodegradable thermoplastic copolyester elastomers: Methyl branched PBAmT
e-Polymers ( IF 3.7 ) Pub Date : 2021-01-01 , DOI: 10.1515/epoly-2021-0024
Wen-Bo Neng 1 , Wen-Guang Xie 2 , Bo Lu 2 , Zhi-Chao Zhen 2 , Jun-Long Zhao 1 , Ge-Xia Wang 2 , Jun-Hui Ji 2
Affiliation  

A series of novel biodegradable copolyesters named poly(butylene 3-methyl adipate co -terephthalate) (PBA m T) were synthesized from the monomers of 3-methyl adipic acid (AA m ), 1,4-butanediol (BDO), and terephthalic acid (TPA) through a process of esterification and polycondensation. 1 H NMR analysis shows that they are random copolymers whose composition can be well controlled by the feed ratio of monomers. From the results of DSC and XRD, the introduction of methyl group successfully destroys the crystallizability of the PBA m chains, thus making it become a relative soft segment compared to PBA, while these random PBA m T copolymers constructed by soft segment PBA m and rigid segment PBT change from semi-crystalline polymers to nearly amorphous polymers as the feed ratio of A m increases. Especially, mechanical tests reveal that the copolymers show outstanding elasticity and rebound resilience with excellent strength. These thermoplastic copolyester elastomers with good performance by simply introduction of branched methyl group on polybutylene adipate terephthalate (PBAT) copolymer chains may well explore the potential application of biodegradable PBAT-based material. Graphical abstract Methyl branched PBA m T possesses excellent elasticity and shows certain degradation performance.

中文翻译:

可生物降解的热塑性共聚酯弹性体:甲基支链PBAmT

由3-甲基己二酸(AA m),1,4-丁二醇(BDO)和对苯二甲酸的单体合成了一系列新型的可生物降解的共聚酯,称为聚(3-丁二酸3-甲基己二酯对苯二甲酸)(PBA m T)。酸(TPA)通过酯化和缩聚过程。1 H NMR分析表明它们是无规共聚物,其组成可以通过单体的进料比很好地控制。根据DSC和XRD的结果,甲基的引入成功破坏了PBA m链的结晶性,因此与PBA相比,它成为相对软链段,而这些无规PBA m T共聚物则由软链段PBA m和刚性结构构成随着A m的进料比增加,链段PBT从半结晶聚合物变为几乎无定形聚合物。尤其,力学测试表明,该共聚物具有出色的弹性和回弹力,并具有出色的强度。通过简单地在聚己二酸对苯二甲酸丁二醇酯(PBAT)共聚物链上引入支链甲基,这些具有良好性能的热塑性共聚酯弹性体可以很好地探索可生物降解的基于PBAT的材料的潜在应用。图形摘要甲基支链PBA m T具有出色的弹性,并显示出一定的降解性能。
更新日期:2021-01-01
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