Clarifying the chemical reactions of the weakening of adhesion between epoxy resin and aluminum by molecular dynamic simulation and experiment

In molecular dynamics simulation, the cross-linked epoxy resin model can well simulate performance of in actual use. We have established a and composite aluminum at level. Based on ReaxFF, reaction simulation pyrolysis aging was carried out by Lammps. The aged is decomposed into H 2 , CO, O, CO CH 4 O. Tensile system out, stress-strain curve obtained. Compared with non-aging, maximum stress reduced 25.77%. order to verify correctness results, an Diglycidyl ether Bisphenol A (DGEBA) as substrate 4,4′- Diaminodiphenyl sulfone (44DDS) curing agent prepared, which coated surface for curing. explore change adhesion during aging, we put samples high-temperature vacuum drying oven 160°C thermal oxygen experiment. state different time studied SEM, XPS FTIR. results showed that decreased 27.16% after aging. chemical bond seriously damaged, content O/C element increased from 15.95% 22.76%, cracks coating significantly. Through experiments, this paper reveals reasons reduction between caused provided theoretical guidance falling off gas-insulated transmission line.