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采用聚丁二烯改性环氧丙烯酸酯(改性环氧树脂)与马来酸酐化低分子量聚丁二烯橡胶(MLPB)均匀涂覆在热处理后的芳纶纤维(AF)表面,使其完全浸润,再将混合物与天然橡胶(NR)制备成母炼胶。探究了改性环氧树脂含量对纤维增强NR复合材料综合性能影响。通过对硫化性质和力学性能分析,改性环氧树脂质量含量为0.1份时,NR复合材料综合性能最佳。胶料的流变性能和拉伸断面形貌分析表明,改性环氧树脂预处理芳纶,改善纤维与基体的粘结,减弱了Payne效应,提高了复合材料的力学性能。
The surface of heat-treated aramid fiber (AF) was uniformly coated with polybutadiene modified epoxy acrylate (modified epoxy resin) and maleated low molecular weight polybutadiene rubber (MLPB) Complete infiltration, and then the mixture with natural rubber (NR) prepared masterbatch. The effect of modified epoxy resin content on the properties of fiber reinforced NR composites was investigated. Through the analysis of vulcanization properties and mechanical properties, NR composite material has the best overall performance when the content of modified epoxy resin is 0.1 part. The rheological properties of rubber compound and the tensile cross-section morphology analysis showed that the modified epoxy resin pretreatment aramid fiber to improve the bond between the fiber and the matrix, weakened the Payne effect, and improved the mechanical properties of the composite.