Abstract:Through formula design, hollow glass microspheres (HGB) modified with silane coupling agent were used as filler, carboxyl group liquid nitrile rubber (CTBN) was used as thickener, toughening agent and epoxy resin (EP) as matrix, EP/CTBN/HGB ternary foam composites were prepared by variable temperature segmentation curing technology and the mechanical properties and rheological behavior were studied. Experimental results show that the fracture ways of the composites are changed from brittle fracture to ductile fracture and the modulus of the composites are also degraded by CTBN, and HGB could compensate the modulus of the composites. When the contents of CTBN and HGB are 12% and 30%, respectively, the impact strength, bending strength, tensile strength and flexural modulus of the ternary composites are better than those of pure EP. In addition, the viscosity of pure EP and epoxy/CTBN blends exhibit the rheological behavior of Newtonian fluids, while the viscosity of the ternary blends shows significant shear thinning.