柔性环氧树脂基复合材料的制备及性能
马翔1，王孝锋2，席玉松3，杨莉1
1.安徽工程大学纺织服装学院，安徽芜湖 241000； 2.湖北三江航天红阳机电有限公司，湖北孝感 432100； 3.中复神鹰碳纤维股份有限公司，江苏连云港 222069
Preparation and Properties of Flexible Epoxy Resin Matrix Composites
Ma Xiang1, Wang Xiaofeng2, Xi Yusong3, Yang Li1
1. Department of Textiles and Apparel, Anhui Polytechnic University, Wuhu 241000, China; 2. Hubei Sangjiang Aerospace Hongyang Electromechanical Co., Ltd., Xiaogan 432100, China; 3. Zhongfu Shenying Carbon Fiber Co., Ltd., Lianyungang 222069, China
摘要：为了提高传统环氧树脂基复合材料的柔韧性，将柔性环氧树脂与传统环氧树脂按一定质量比制备成混合环氧树脂体系，以芳纶纤维为增强体，制备芳纶增强环氧树脂基复合材料(AERC)。研究了混合环氧树脂体系对AERC拉伸、弯曲和冲击等力学性能的影响。结果表明，混合环氧树脂体系中柔性环氧树脂的添加对AERC的力学性能有较大影响。采用混合环氧树脂体系的AERC的冲击强度大幅提高，当柔性环氧树脂含量为混合环氧树脂体系质量的20%时，AERC的冲击强度增加了34.01%。且AERC的冲击强度随着柔性环氧树脂含量的增加不断增大。采用混合环氧树脂体系后，AERC的弯曲强度和拉伸强度均有所减小，在混合树脂体系中加入质量分数20%柔性环氧树脂时，AERC的弯曲强度下降了178% ，且AERC的弯曲强度和拉伸强度下降率随混合树脂体系中柔性环氧树脂含量的增加而不断增大。以单一刚性环氧树脂和混合环氧树脂为基体的AERC弯曲及拉伸损伤形式及机理有所不同，相对于未加柔性环氧树脂的复合材料，以混合环氧树脂体系为基体的复合材料并没有发生明显分层及弯曲断裂破坏。
Abstract：In order to improve the flexibility of the traditional epoxy resin matrix composite, the flexible epoxy resin and the traditional epoxy resin were prepared into a mixed epoxy resin matrix in a certain proportion, and the aramid reinforced epoxy resin composite (AERC) was prepared with aramid fiber as the reinforcing material. The influences of the mixed epoxy resin system on the mechanical properties of AERC such as tensile, flexural and impact strength were investigated. The results show that the addition of flexible epoxy resin in the epoxy resin matrix has a great influence on the mechanical properties of AERC. The impact strength of AERC with mixed epoxy resin matrix is greatly improved, when the content of the flexible epoxy resin is 20 wt% of mixed epoxy resin mass, the impact strength of AERC increases by 34.01%. And the impact strength of AERC increases with the increase of the mass percentage of the flexible epoxy resin in the mixed resin matrix. The bending strength and tensile strength of AERC with the mixed epoxy resin system are lower than those without the flexible epoxy resin. When 20 wt% flexible epoxy resin is added to the mixed resin system, the bending strength of AERC decreases by 178%, and the decrease rates of the bending strength and tensile strength of AERC increase with the increase of the mass percentage of the flexible epoxy resin in the mixed resin matrix. However, the bending and tensile damage forms and mechanisms of AERCs with single rigid epoxy and mixed epoxy resin matrix are different. The AERC with mixed epoxy resin matrix does not has obvious delamination and bending damage in the form of fracture compared with the composite without flexible epoxy resin.
关键词：柔性；复合材料；环氧树脂；芳纶；力学性能
Keywords：flexibility; composite; epoxy resin; aramid; mechanical property
基金：安徽省教育厅高校重点研究项目(KJ2019A0146) ，安徽省纺织面料重点实验室项目(2021AETKL22)
本文引用格式：
马翔，王孝锋，席玉松，等.柔性环氧树脂基复合材料的制备及性能[J].工程塑料应用，2022，50(11)：25-30.
Ma Xiang，Wang Xiaofeng，Xi Yusong，et al. Preparation and properties of flexible epoxy resin matrix composites[J]. Engineering Plastics Application，2022，50(11)：25-30.
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