吸波涂料用环氧粘接剂改性研究

Study on the Modification of Epoxy Adhesive for Antiradar Coating

针对厚涂层吸波涂料用环氧粘接剂存在的拉伸强度低、柔韧性差、耐温性低等不足,在满足吸波涂料隐身性能及喷涂性能的前提下,研究了某液体橡胶的添加量对吸波涂层拉伸强度及柔韧性等性能的影响,并应用环境扫描电镜(SEM)和差示扫描量热仪(DSC)研究了液体橡胶添加量对该吸波涂层冲击断面的形貌以及玻璃化转变温度(T-g)的影响。测试结果表明吸波涂层的T-g随着液体橡胶的增加而降低,且优选的吸波涂料用环氧粘接剂配方可使该吸波涂层在80℃条件下正常固化,在钢材及铝材表面的拉伸强度分别达到8 MPa及6 MPa以上,涂层在1 mm薄板基材上弯曲90°不断裂。该研究成果不但可扩大吸波涂料在不同基材上拉伸强度及柔韧性等高性能要求下的应用范围,而且可提高其施工工效。

Aiming at the shortage of antirader coating tensile strength, flexibility and hot-resistant function, we studied that both the influence of different additive quantities of the liquid rubber on the antiradar coatings tensile strength and flexibility, and the influence of those on its fracture surface and glass transition temperature by SEM and DSC, on the presupposition of the satisfied stealth and spraying functions for the coating. The test shows that the T-g of modified epoxy adhesive is reduced with the increase of the liquid rubber; and the optimized adhesive formula makes the coating solidify normally at 80℃ of which the tensile strength is over 8 MPa on steel plate, orer 6 MPa on aluminium plate and the fracture can＇ t occur at bending of 90° on the base plate of thickness 1 mm. The research results can extend the applied scope and the working efficiency for the coating on different base plates in the case of higher tensile strength and flexibility.