Research on the bonding performance of different types of epoxy resin to metal substrates
Epoxy adhesive was prepared by using bisphenol A-type epoxy resin,polyurethane modified epoxy resin,or CTBN modified epoxy resin as resin raw materials,and adding additives such as dicyandiamide,substituted urea,calcium carbonate,and fumed silica.The adhesion of different types of epoxy resin(E-44,E-51,PUEP-A,PUEP-B,CTBN modified epoxy resin)to different metal substrates such as cold-rolled steel,5052 aluminum alloy,6061 aluminum alloy was explored,and one-component epoxy resin adhesive with good mechanical and bonding properties was developed.The research results showed that,(1)Bisphenol A-type epoxy resin had poor adhesion to metal substrates,while the addition of modified epoxy resin(polyurethane modified epoxy resin or CTBN modified epoxy resin)could improve adhesion.(2)There existed a modified epoxy resin content that made the cohesive strength of the adhesive equivalent to the bonding strength to the substrate.At this point,the adhesive's adhesion and mechanical strength reached a balance,and the bonding performance was the best.(3)The orthogonal experimental method was used to determine that the adhesive exhibited the best performance when the mass ratio of E-51,PUEP-A,PUEP-B,and CTBN modified epoxy resin was 2∶1∶1∶1.
万方数据
维普
