Preparation of Epoxy Adhesives with High Performance at High-Low Temperature
Based on the adhesive formulation developed by the team,a high performance structural adhesive suitable for steel bridge reinforcement was prepared.The influence of nano-SiO2 content,the blending ratio of amine curing agent 105 and polyetheramine D230,as well as the curing time on the ambient temperature performance of the adhesive,was investigated.Additionally,the mechanical properties of the adhesive at different working temperatures were explored.Results indicates that when the nano-SiO2 content is 0.75%,and the mass ratio of amine curing agent 105 to polyetheramine D230 is 3∶4,with a curing regimen of 90℃ for 2.5 hours,the adhesive exhibited optimal ambient temperature mechanical performance.Furthermore,it maintains good mechanical properties at both low(-20℃ )and high(70℃ )temperatures.
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