微米尺度无机填料对聚乙烯复合材料形态影响的新见解

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-04-07 DOI:10.1016/j.coco.2025.102394

Erika Varga, László Tóth, Balázs Ádám, Ferenc Tajti, Pál Hansághy

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引用次数: 0

摘要

无机填料的热塑性复合材料因其可调的物理性能而受到越来越多的研究，但在微米尺度上对化学未改性的基质-填料界面的基本见解仍然有限。本研究通过在微米范围内掺入天然云母和碳酸钙，考察了填料形态对具有不同分支度的聚乙烯的影响。通过SEM和DMA验证了填料的均匀分散和取向，同时通过DSC、DMA、拉伸测试和Charpy冲击测试分析了热、机械和热机械性能。结果表明，与填料形态无关，结晶度和冲击强度降低，而弹性模量随着填料长径比的增加而增加。基体性能影响复合材料强度，填料长径比增加了DMA的能量耗散。预测弹性模量和抗拉强度的数学模型也进行了评估。这项研究为热塑性系统中填料形态、基体结构和复合材料性能的相互作用提供了关键的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Novel insights into the morphological effects of micron-scale inorganic fillers on polyethylene composites

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Novel insights into the morphological effects of micron-scale inorganic fillers on polyethylene composites

Thermoplastic composites with inorganic fillers are increasingly studied for their tunable physical properties, yet fundamental insights into chemically unmodified matrix-filler interfaces at micron scales remain limited. This research examines the effect of filler morphology on polyethylene with varying branching degrees through incorporation of natural mica and calcium carbonate in the micrometer range.

Uniform dispersion and orientation of fillers were validated through SEM and DMA, while thermal, mechanical, and thermomechanical properties were analyzed using DSC, DMA, tensile testing, and Charpy impact tests. The results showed reduced crystallinity and impact strength, irrespective of filler morphology, while elastic modulus increased with higher filler aspect ratios. Matrix properties influenced composite strength, and DMA demonstrated increased energy dissipation driven by filler aspect ratio.

Mathematical models for predicting elastic modulus and tensile strength were also evaluated. This study provides key insights into the interplay of filler morphology, matrix structure, and composite performance in thermoplastic systems.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.