常温定型剂对乙烯基酯树脂复合材料性能影响

The influence of room temperature tackifier on the properties of vinyle ester resin composites

开发了一种乙烯基酯树脂用常温液态定型剂,并用于预成型体制备,进一步采用VARI成型工艺制备了复合材料。研究了定型剂含量对纤维织物定型效果、VARI成型工艺性、复合材料力学性能的影响。采用厚度回弹、U形回弹的实验方法对定型剂的定型效果进行评价;通过预成型体的渗透率实验对定型织物的VARI成型工艺性进行评价;并采用弯曲性能、层间剪切性能测试对复合材料的力学性能进行表征。结果表明:当定型剂含量为纤维织物质量的6wt%时,织物的预定型效果最好,且能够保持较好的渗透性;定型剂用量对复合材料弯曲性能和层间剪切性能影响较小,能够在改善其工艺性的同时实现复合材料力学性能无明显降低。

A room temperature liquid tackifier for vinyl ester resin was developed for the preparation of preforms,and the composite material was prepared by VARI molding process.The effects of tackifier content on fiber fabric setting effect,VARI molding processability and mechanical properties of composites were studied.The setting effect of the tackifier was evaluated by the experimental methods of thickness rebound and U-shaped rebound;the VARI molding processability of the setting fabric was evaluated by the permeability test of the preform;and the mechanical properties of the composites were characterized by bending and interlaminar shear tests.The results show that when the content of the tackifier is 6 wt% of the fiber fabric,the presetting of the fabric is the best,and it can maintain a good permeability;the amount of the tackifier has little effect on the bending properties and interlaminar shear properties of the composites,which can improve the manufacturability and achieve no significant decrease in the mechanical properties of the composite material.