制备具有优异韧性和气体阻隔性能的可生物降解聚（乳酸）/聚[（丁烯二醇）-共呋喃二甲酸酯]共混物

IF 2.9 4区化学 Q2 POLYMER SCIENCE

Polymer International Pub Date : 2024-08-27 DOI:10.1002/pi.6692

Yong Yang, Jing Shen, Erxun Hu, Yajin Fang, Zhibo Xu, Juan Li

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引用次数: 0

摘要

众所周知，聚乳酸（PLA）是最有前途的可生物降解聚酯之一，但其固有的脆性和不充分的气体阻隔性能限制了其作为薄膜材料的潜在应用。本文合成了具有优异柔韧性和良好气体阻隔性能的聚[（丁烯二醇）-共呋喃二甲酸酯]（PBDF），并将其与聚乳酸熔融共混。与纯聚乳酸相比，聚乳酸/PBDF20 共混物的断裂伸长率提高了 40 多倍，达到 176.7% 以上。此外，其氧气、二氧化碳和水的渗透系数分别降低了 21.3%、50.8% 和 46.3%。此外，聚乳酸/PBDF20 混合物还表现出更好的生物降解性，堆肥 5 周后，重量损失率从纯聚乳酸的 2.7% 增加到 19.0%。值得注意的是，在聚乳酸/PBDF 混合物中加入多功能环氧相容剂（Joncryl ADR®-4368）可进一步提高其韧性和气体阻隔性能，这可能归功于聚乳酸和 PBDF 之间混溶性的改善。© 2024 化学工业协会。

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Preparation of biodegradable poly(lactic acid)/poly[(butylene diglycolate)‐co‐furandicarboxylate] blends with excellent toughness and gas barrier performance

Poly(lactic acid) (PLA) is known as one of the most promising biodegradable polyesters, while inherent brittleness and insufficient gas barrier performance limit its potential application as a film material. Herein, poly[(butylene diglycolate)‐co‐furandicarboxylate] (PBDF) with excellent flexibility and good gas barrier properties was synthesized and then melt‐blended with PLA. Compared with neat PLA, the elongation at break of the PLA/PBDF20 blend increased more than 40 times and reached over 176.7%. In addition, its O2, CO2 and H2O permeability coefficients decreased by 21.3%, 50.8% and 46.3%, respectively. Moreover, the PLA/PBDF20 blend also exhibited better biodegradability, with a weight loss rate increasing from 2.7% of neat PLA to 19.0% after 5 weeks of composting. Notably, incorporation of a multifunctional epoxy compatibilizer (Joncryl ADR®‐4368) into the PLA/PBDF blends further enhanced their toughness and gas barrier performance, which could be attributed to the improvement of the miscibility between PLA and PBDF. © 2024 Society of Chemical Industry.

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来源期刊

Polymer International 化学-高分子科学

CiteScore

7.10

自引率

3.10%

发文量

135

审稿时长

4.3 months

期刊介绍： Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.