Preparation of lightweight PBS foams with high ductility and impact toughness by foam injection molding

IF 3.2 3区化学 Q2 POLYMER SCIENCE

e-Polymers Pub Date : 2024-06-29 DOI:10.1515/epoly-2024-0034

Jiangbin Xu, Jinfu Xing, Mei Luo, Tingyu Li, Bujin Liu, Xiangbu Zeng, Tuanhui Jiang, Xian Wu, Li He

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引用次数: 0

Abstract

Lightweight and highly tough polymer foams play a crucial role in resource conservation and environmental protection. One such biodegradable material that has garnered attention for its excellent processability and mechanical properties is polybutylene succinate (PBS). However, achieving PBS foams with superior mechanical properties remains a significant challenge. In this study, we prepared PBS foams with higher ductility and impact toughness using foam injection molding. The improved ductility of these foams can be attributed to the highly oriented cellular structure along the direction of the tensile load, transforming from regular circular shapes to tubular ones. This cellular structure effectively blunts crack tips, thereby enhancing impact performance. When the mold-opening distance is 0.4 mm, the fracture elongation of PBS foams is 486%, the tensile toughness is 4,586 MJ·cm−3, and the impact strength is 12.73 kJ·m−2. These values are 98%, 53%, and 29% higher than those of unfoamed PBS, respectively. As the mold-opening distance increases, the relative density of PBS foams decreases, leading to a reduction in fracture elongation, tensile toughness, and impact strength. Interestingly, the specific impact strength of PBS foams consistently surpasses that of unfoamed PBS, and increases proportionally to the mold-opening distance.

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通过泡沫注射成型制备具有高延展性和冲击韧性的轻质 PBS 泡沫

重量轻、韧性高的聚合物泡沫在节约资源和保护环境方面发挥着至关重要的作用。聚丁二酸丁二醇酯（PBS）是一种可生物降解材料，因其出色的加工性和机械性能而备受关注。然而，实现具有优异机械性能的聚丁二酸丁二醇酯泡沫仍是一项重大挑战。在这项研究中，我们利用泡沫注射成型技术制备了具有更高延展性和冲击韧性的聚丁二酸丁二醇酯泡沫。这些泡沫延展性的提高可归因于沿拉伸载荷方向高度取向的蜂窝结构，从规则的圆形转变为管状。这种蜂窝状结构可有效钝化裂纹尖端，从而提高冲击性能。当开模距离为 0.4 毫米时，PBS 泡沫的断裂伸长率为 486%，拉伸韧度为 4,586 MJ-cm-3，冲击强度为 12.73 kJ-m-2。这些数值分别比未发泡的 PBS 高出 98%、53% 和 29%。随着开模距离的增加，PBS 泡沫的相对密度降低，导致断裂伸长率、拉伸韧度和冲击强度降低。有趣的是，PBS 泡沫的比冲击强度一直超过未发泡 PBS，并且随着开模距离的增加而成正比增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

e-Polymers 化学-高分子科学

CiteScore

5.90

自引率

10.80%

发文量

审稿时长

6.4 months

期刊介绍： e-Polymers is a strictly peer-reviewed scientific journal. The aim of e-Polymers is to publish pure and applied polymer-science-related original research articles, reviews, and feature articles. It includes synthetic methodologies, characterization, and processing techniques for polymer materials. Reports on interdisciplinary polymer science and on applications of polymers in all areas are welcome. The present Editors-in-Chief would like to thank the authors, the reviewers, the editorial staff, the advisory board, and the supporting organization that made e-Polymers a successful and sustainable scientific journal of the polymer community. The Editors of e-Polymers feel very much engaged to provide best publishing services at the highest possible level.