Abstract:Quasi static tensile tests for four types of epoxy adhesive were conducted in the electro hydraulic servo test system with environmental chamber, and dynamic mechanic performances were tested by dynamic thermal mechanical analyzer. The thermal effects on the static and dynamic mechanical properties of epoxy adhesives were studied, and the evaluation methods for the high temperature resistance were discussed. The results show that the stress strain curve of the adhesives changes significantly under different temperatures and exhibits four morphological shapes. With the temperature increase, the strength of the adhesive and deformation resistance ability falls sharply, and the storage modulus degrades by 23 orders of magnitude in the glass transition interval. The glass transition temperatures and thermal deformation temperatures exhibit the same relationship: Araldite 2014>Calle1>Sika 30>Araldite 420. The strength and strain energy of the adhesive Calle1 toughened by flexible segment and core/shell structure polymers are the highest at 5570℃. The glass transition temperature obtained by the tangential method has a residual modulus ratio of more than 51%. The thermal deformation temperatures obtained by method C are close to that of the tangential method, and the maximum working temperatures of the adhesive obtained by the two methods are safer.