Process parameter–mechanical property relationships and influence mechanism of advanced CFF/PEEK thermoplastic composites,Polymer Composites

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Process parameter–mechanical property relationships and influence mechanism of advanced CFF/PEEK thermoplastic composites
Polymer Composites ( IF 4.8 ) Pub Date : 2022-06-20 , DOI: 10.1002/pc.26801
Jiqiang Hu ₁ , Hanqi Zhang ₁ , Shuai Li ₁ , Chunming Ji ₁ , Shuai Chen ₁ , Zhengong Zhou ₁ , Bing Wang ₁

Affiliation

Process parameters, as the core factor to control the forming quality of composites, are crucial for the processing of composites. In this paper, plain-woven carbon fiber fabric reinforced polyether ether ketone (CFF/PEEK) thermoplastic composites are fabricated by hot-pressing process. Influence of the critical process parameters, including molding temperature, molding pressure and holding time, on mechanical properties of CFF/PEEK composites are investigated. The tensile, flexural and short-beam shear properties of CFF/PEEK composites fabricated by different process parameters were tested as evaluation indicators to achieve the optimization of process parameters. Most importantly, to deeply and systematically reveal the influence mechanism of process parameters, the high-temperature contact angle of CFF-PEEK and the viscosity-temperature characteristics of PEEK were observed and analyzed. In addition, the forming quality and microscopic failure modes of CFF/PEEK composites were observed by optical, metallographic and scanning electron microscopy, respectively. This work provides a research idea and technical route for studying the process parameters of fiber reinforced polymer composites and revealing their influence mechanism on mechanical properties.

中文翻译：

先进CFF/PEEK热塑性复合材料的工艺参数-力学性能关系及影响机理

工艺参数作为控制复合材料成型质量的核心因素，对复合材料的加工至关重要。本文采用热压工艺制备平纹碳纤维织物增强聚醚醚酮（CFF/PEEK）热塑性复合材料。研究了关键工艺参数（包括成型温度、成型压力和保温时间）对 CFF/PEEK 复合材料机械性能的影响。以不同工艺参数制备的CFF/PEEK复合材料的拉伸、弯曲和短束剪切性能作为评价指标，实现工艺参数的优化。最重要的是，深入系统地揭示工艺参数的影响机理，观察分析了CFF-PEEK的高温接触角和PEEK的粘温特性。此外，分别通过光学、金相和扫描电子显微镜观察了CFF/PEEK复合材料的成型质量和微观失效模式。该工作为研究纤维增强聚合物复合材料的工艺参数并揭示其对力学性能的影响机理提供了研究思路和技术路线。

更新日期：2022-06-20

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