Reactive extrusion for efficient preparation of high temperature resistant PA6T/66/BN composites with great thermal management and mechanical properties

IF 6.5 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composites Communications Pub Date : 2024-10-10 DOI:10.1016/j.coco.2024.102121
Zejun Cao, Shiyuan Zhang, Chen Wang, Yimin Xu, Wei Zhao, Xin Li, Yuancheng Zhang, Zhe Cui, Peng Fu, Xinchang Pang, Xiaomeng Zhang, Minying Liu
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Abstract

High temperature resistant polymer-based composite with high thermal conductivity and great mechanical properties are highly demanded in the field of electronic devices for simultaneously meeting surface mounting process and high-power operation. The key to achieving this goal is to balance the contradiction between the high melt viscosity of high-temperature resistant polymers and the dispersibility of fillers. In this work, the high-performance polyamide 6T/66/hexagonal boron nitride (PA6T/66/BN) composites were fabricated successfully via the method combining prepolymerization and reactive extrusion. Results demonstrated that this method not only significantly improves the preparation efficiency of high temperature resistant polyamide and its composites, but also enables the prepared composites to reach 3.6 W/(m⋅K), over 299 °C and 67.8 MPa in thermal conductivity, melting point and tensile strength respectively. Furthermore, the prepared composite exhibits excellent thermal management effects on LED and CPU. Therefore, the results of this work are of great significance for the efficient preparation and wide application of high-temperature resistant polymer based thermally conductive composites.

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反应挤压法高效制备具有良好热管理和机械性能的耐高温 PA6T/66/BN 复合材料
电子设备领域对同时满足表面贴装工艺和大功率运行的高导热性和高机械性能的耐高温聚合物基复合材料有很高的要求。实现这一目标的关键在于平衡耐高温聚合物的高熔融粘度与填料分散性之间的矛盾。在这项工作中,通过预聚合和反应挤压相结合的方法,成功制造出了高性能聚酰胺 6T/66/六方氮化硼(PA6T/66/BN)复合材料。结果表明,该方法不仅显著提高了耐高温聚酰胺及其复合材料的制备效率,而且使制备的复合材料的热导率、熔点和拉伸强度分别达到 3.6 W/(m-K)、299 ℃ 以上和 67.8 MPa。此外,所制备的复合材料对 LED 和 CPU 具有出色的热管理效果。因此,该研究成果对于高效制备和广泛应用基于耐高温聚合物的导热复合材料具有重要意义。
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来源期刊
Composites Communications
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.
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