Rheological, thermal, and mechanical properties of poly(butylene succinate) (PBS)/poly(L-lactide) (PLA) fiber biodegradable green composites

IF 2.2 4区化学 Q3 CHEMISTRY, PHYSICAL

Colloid and Polymer Science Pub Date : 2024-04-04 DOI:10.1007/s00396-024-05243-0

Junhao Li, Xiuli Wang, Yi Li, Hongliang Hu, Xiwen Liang

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Abstract

Biodegradable green composites of poly(butylene succinate) (PBS) and poly(L-lactide) (PLA) fibers were initially melt-blended aiming to obtain balanced comprehensive properties. According to the morphological observations, the PLA fibers were uniformly embedded in the PBS matrix. Rheology measurements suggested that the incorporation of PLA fibers improved the viscoelasticity of PBS melt. The percolation network of PLA fibers was formed at content of 20 wt%. The presence of PLA fibers inhibited the crystallization and reduced the isothermal crystallization rate of PBS in the composites. Moreover, the reinforcing effect of PLA fibers on the PBS matrix was found to be very significant. The storage modulus and tensile modulus of the composite with 30 wt% PLA fibers were 74% and 94% higher than those of neat PBS, respectively. PBS/PLA fiber composites prepared by simple melt blending method displayed the combination of enhanced melt strength and modulus, while maintaining the biodegradability of PBS matrix, which is of great potential for the wider practical application of environmentally friendly polymers.

Graphical Abstract

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聚（丁二酸丁二醇酯）（PBS）/聚（左旋乳酸）（PLA）纤维可生物降解绿色复合材料的流变、热和机械特性

摘要聚丁二酸丁二醇酯（PBS）和聚乳酸（PLA）纤维的可生物降解绿色复合材料最初是通过熔融混合来获得均衡的综合性能。根据形态观察，聚乳酸纤维均匀地嵌入到 PBS 基质中。流变学测量表明，聚乳酸纤维的加入改善了 PBS 熔体的粘弹性。当聚乳酸纤维含量为 20 wt% 时，聚乳酸纤维的渗滤网络已经形成。聚乳酸纤维的存在抑制了复合材料中 PBS 的结晶，降低了等温结晶速率。此外，聚乳酸纤维对 PBS 基体的增强效果也非常显著。30 wt% PLA 纤维复合材料的存储模量和拉伸模量分别比纯 PBS 高 74% 和 94%。采用简单的熔融共混方法制备的 PBS/PLA 纤维复合材料在保持 PBS 基体生物降解性的同时，还提高了熔体强度和模量，这对于环境友好型聚合物的广泛实际应用具有很大的潜力。图表摘要

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来源期刊

Colloid and Polymer Science 化学-高分子科学

CiteScore

4.60

自引率

4.20%

发文量

111

审稿时长

2.2 months

期刊介绍： Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.