水下可固化环氧胶粘剂湿热耐久性能研究

Study on hygrothermal durability of underwater curable epoxy adhesive

系统研究了一种水下可固化环氧胶粘剂在不同温度水浸泡条件下的水吸收、热-力学性能演化,并利用Arrhenius方程对在实际服役温度下胶粘剂和胶粘剂-钢界面的长期寿命进行了预测。研究结果表明:该胶粘剂的饱和吸水率为2.05%;长期浸泡后其玻璃化转变温度、拉伸性能均发生退化,但其拉伸强度长期寿命保留率超过60%,胶粘剂-钢界面的粘接强度长期寿命保留率为54.30%,说明该胶粘剂能够在水浸泡环境下长期使用。

The evolution of water absorption,thermal-mechanical properties of an underwater curable epoxy adhesive immersed in water at different temperatures was systematically studied,and the long-term life of the adhesive and adhesive-steel interface at actual service temperature was predicted using Arrhenius equation.The research results showed that the adhesive had the saturated absorption rate of 2.05%.After long-term immersion,the glass transition temperature and tensile properties of the adhesive deteriorated,but the long-term life retention rate of its tensile strength exceeded 60%,and the long-term life retention rate of bonding strength of the adhesivesteel interface was 54.30%,indicating that the adhesive could be used in water immersion environment for a long time.