Preparation of Small-Diameter Phenolic-Based CFRP Rods Using Multi-Die Pultrusion

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES Applied Composite Materials Pub Date : 2024-01-12 DOI:10.1007/s10443-023-10193-x

Guannan Li, Junwei Qi, Yuequan Wang, Jiaqi Shi, Rui Jia

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Abstract

This paper introduces a novel multi-die pultrusion system for producing small-diameter phenolic-based CFRP rods. The system consists of multiple short heating dies arranged in series, facilitating the escape of vapor from the die cavities and improving the product quality. The results demonstrate that compared to the traditional dies, the rods produced using the multi-die pultrusion system exhibit higher dimensional stability, and their interlaminar shear strength is mostly above 35 MPa, reaching up to 52 MPa. Compared to the traditional mold, in one instance, its interlaminar shear strength value increased by nearly 71.5%, but in another case, it was only 14.72%. Due to relying solely on one control sample, the results are inconclusive. SEM indicates that the rods produced using the multi-die pultrusion system have fewer voids and better fiber-resin bonding compared to the traditional dies. Additionally, cross-sectional optical microscopy shows that when the pultrusion speed is at or below 0.6 m/min, the impregnation of carbon fibers by phenolic resin is more effective. The proposed multi-die pultrusion system provides a new idea for the production of small-diameter rods.

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利用多模拉挤技术制备小直径酚醛基 CFRP 棒材

摘要本文介绍了一种用于生产小直径酚醛基 CFRP 棒材的新型多模拉挤系统。该系统由多个串联排列的短加热模组成，有利于蒸汽从模腔中逸出，提高了产品质量。结果表明，与传统模具相比，使用多模拉挤系统生产的棒材具有更高的尺寸稳定性，层间剪切强度大多在 35 兆帕以上，最高可达 52 兆帕。与传统模具相比，其中一个实例的层间剪切强度值提高了近 71.5%，但另一个实例却仅提高了 14.72%。由于仅依靠一个对照样本，结果并不确定。扫描电子显微镜表明，与传统模具相比，使用多模具拉挤系统生产的棒材空隙更少，纤维与树脂的粘结性更好。此外，横截面光学显微镜显示，当拉挤速度在 0.6 米/分钟或以下时，酚醛树脂对碳纤维的浸渍效果更好。所提出的多模拉挤系统为生产小直径棒材提供了一种新思路。图表摘要

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来源期刊

Applied Composite Materials 工程技术-材料科学：复合

CiteScore

4.20

自引率

4.30%

发文量

审稿时长

1.6 months

期刊介绍： Applied Composite Materials is an international journal dedicated to the publication of original full-length papers, review articles and short communications of the highest quality that advance the development and application of engineering composite materials. Its articles identify problems that limit the performance and reliability of the composite material and composite part; and propose solutions that lead to innovation in design and the successful exploitation and commercialization of composite materials across the widest spectrum of engineering uses. The main focus is on the quantitative descriptions of material systems and processing routes. Coverage includes management of time-dependent changes in microscopic and macroscopic structure and its exploitation from the material''s conception through to its eventual obsolescence.