利用强剪切流场构建具有高强度和高韧性的原位微纤维 PA6/PLA 复合材料

IF 4.1 2区化学 Q2 POLYMER SCIENCE Polymer Pub Date : 2024-08-27 DOI:10.1016/j.polymer.2024.127544

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引用次数: 0

摘要

通过多级拉伸挤出系统生产出了具有高强度和韧性的原位微纤维 PA6/PLA 复合材料 (MFC)。PA6 微纤维诱导聚乳酸晶体垂直于 PA6 微纤维生长，显著提高了 MFC 的机械性能。值得注意的是，含有 9 wt% PA6 微纤维的 PLA-9 样品获得了优异的拉伸强度和断裂伸长率（分别为 79.1 MPa 和 77.8 %），分别是纯聚乳酸的 1.3 倍和 13.4 倍。在拉伸过程中，PA6 微纤维发生了塑性变形，并伴随着聚乳酸薄片的分离和破碎。

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Constructing In situ microfibrillar PA6/PLA composites with high strength and high toughness by a strong shear flow field

In situ microfibrillar PA6/PLA composites (MFCs) with high strength and toughness were produced via a multistage stretching extrusion system. The PA6 microfibrils induced the growth of PLA crystals perpendicular to the PA6 microfibrils and significantly enhanced the mechanical properties of the MFCs. Notably, the PLA-9 sample with 9 wt% PA6 microfibrils achieved excellent tensile strength and elongation at break (79.1 MPa and 77.8 %, respectively), which were 1.3 and 13.4 times than those of neat PLA. During the tensile process, the PA6 microfibrils underwent plastic deformation accompanied by the detachment and fragmentation of the PLA lamellae.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.

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