不同无纺布对玻纤/乙烯基酯复合材料力学性能的影响

EFFECT OF DIFFERENT NON-WOVEN FABRICS ON MECHANICAL PROPERTIES OF GLASS FIBER/VINYL ESTER COMPOSITES

为了改善玻纤/乙烯基酯(GF/VE)复合材料的层间性能,采用VARI工艺制备层间加入共聚酯(PEs)、聚氨酯(TPU)、聚酰胺(PA)、乙烯-醋酸乙烯基酯(EVA)无纺布的GF/VE复合材料,对其拉伸、弯曲和Ⅰ型层间断裂韧性进行了研究。结果表明:加入PEs、TPU、PA、EVA无纺布分别使GF/VE复合材料Ⅰ型层间断裂韧性提高了142%、103%、46%、45%;加入TPU无纺布使GF/VE复合材料拉伸强度提升了6.43%,其余分别下降了2.93%、3.72%、28.67%;加入不同无纺布后弯曲强度分别下降了13%、14%、25%、60%。共聚酯和聚氨酯无纺布对GF/VE复合材料的增强、增韧效果优于聚酰胺材料。

In order to improve the interlaminar properties of glass fiber/vinyl ester(GF/VE)composites,GF/VE composites with polyamide(PA),copolyester(PEs),polyurethane(TPU)and vinyl acetate(EVA)nonwoven fabrics were prepared by VARI process.The tensile,flexural and mode Ⅰ interlaminar fracture toughness of the composites were studied.The results show that the mode Ⅰ interlaminar fracture toughness of GF/VE composites increases by 142%,103%,46% and 45%,respectively,by adding PEs,TPU,PA and EVA nonwoven fabrics.The tensile strength of GF/VE composites increased by 6.43% by adding TPU non-woven fabrics,while the others decreased by 2.93%,3.72% and 28.67%,respectively.After adding different non-woven fabrics,bending strength decreased by 13%,14%,25% and 60%,respectively.The strengthening and toughening effects of co-polyester and polyurethane nonwoven fabrics on GF/VE composites are better than that of polyamide materials.