Synergistic Improvement of Mechanical, Creep, and Dimensional Stability in Ultra-Highly Filled Wood Fiber/Polyethylene Composites Using Multimodal Alloy Matrices

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-02-28 DOI:10.1016/j.compositesa.2025.108830

Junjie Xu , Xiaolong Hao , Shangkun Huang , Chuanfu Chen , Qi Fan , Lichao Sun , Rongxian Ou , Qingwen Wang

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Abstract

Enhancing the mechanical properties and dimensional stability of ultra-highly filled wood-plastic composites (UH-WPCs) presents significant challenges. This study developed UH-WPCs with 70–90 wt% loading using six binary alloy matrices with multimodal and unimodal distributions. FTIR spectroscopy and thermogravimetric analysis revealed an average MAPE esterification rate of 11.9% at 80 wt% loading. Density, morphology, and dynamic mechanical analysis revealed that multimodal high molecular weight alloys significantly improved uniformity and interfacial adhesion compared to unimodal alloys. This increased tensile, flexural, and impact strengths by 30.1%, 22.7%, and 61.8%, respectively, while reducing thermal expansion, creep, and water absorption by 14.0%, 17.1%, and 13.1%. The low molecular weight fraction of multimodal HDPE facilitated miscibility with MAPE, promoted esterification, and minimized fiber damage, while the high molecular weight fraction enhanced composite integrity and cohesiveness. Notably, chain entanglement within the alloy was more critical than esterification rate in improving the mechanical and dimensional stability of UH-WPCs.

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.