有机膨润土增稠低温固化乙烯基酯树脂预浸料的性能

Properties of low temperature curing vinyl ester resin prepreg thickened by organic bentonite

为制备一种低温固化乙烯基酯树脂预浸料并研究增稠剂含量对预浸料及复合材料性能的影响,采用有机膨润土为增稠剂、无碱玻璃纤维布为增强材料,以一步浸渍法制备了纤维预浸料;通过真空袋压成型,在60℃下预热30 min,90℃下固化1 h,得到固化程度良好的复合材料。研究不同含量有机膨润土预浸料的工艺性能及复合材料的力学性能,结果表明,各预浸料树脂含量有细微差别,黏性级别均为1级,工艺性能良好。复合材料的力学性能在膨润土质量含量为10%时,拉伸强度为395 MPa,弯曲强度为382 MPa,压缩强度为201 MPa,综合力学性能最为优异。

In order to prepare a low-temperature curing vinyl ester resin prepreg and study the effect of thickener content on the properties of prepreg and composite materials,organic bentonite was used as thickener and alkali-free glass fiber cloth was used as reinforcement material to prepare fiber prepreg by one-step impregnation method.The composite was formed by vacuum bag pressing,preheated at 60℃for 30 min,and cured at 90℃for 1 h.The technological properties of different organic bentonite prepreg materials and mechanical properties of the composites were investigated.The results show that the resin content of each prepreg material is slightly different,and the viscosity level is grade 1,so the technological properties are good.When the mass content of bentonite is 10%,the tensile strength is 395 MPa,the bending strength is 382 MPa and the compressive strength is 201 MPa,and the comprehensive mechanical properties are the best.