ADHESIVE AND PHYSICAL MECHANICAL PROPERTIES OF POLYMER COMPOSITE MATERIALS, FILLED BY POLYSTYRENE «OASIS» FOR TRANSPORT EQUIPMENT

Abstract

The prospects of polystyrene «Oasis» usage for the formation of composite materials with improved adhesion and cohesion properties based on epoxy diane oligomer ED-20, which is characterized by improved cohesive strength and low shrinkage. The usage of PEPA hardener is provided for further creation of complex compounds with epoxy oligomer. The influence of "Oasis" polystyrene on the adhesion and cohesion properties of the epoxy matrix was studied. As a result of the data’s analysis, obtained after the experiment, the optimal content of filler was established, which provides maximum adhesion strength at shear and shifting, residual stresses, modulus of elasticity, destructive bending stresses and impact strengtch. Obtaining a material with optimal adhesion strength provides the adding of a filler with a content of q = 0,08 mass.%. in epoxy oligomer ED-20. The following parameters were obtained for this content: adhesion strength at separation σ_а = 37,2 MPa, adhesive strength at shear – τ = 6,1 MPa, residual stresses - σ_res = 1,2 MPa. For the formation of composite materials with maximum physical and mechanical properties, it is advisable to use an additive with a content of q = 0,06…0,08 mass.%. including the formation of materials with the following indicators: destructive bending stresses σ_dest = 32,0… 44,5 MPa, modulus of elasticity in bending E = 1,5…2,1 GPa The optimal content of polystyrene for the formation of material with maximum impact resistance the load is q = 0,02…0,08 ,mass.% including, at which the impact strength is W = 9.3…11.8 kJ/m2 Indirect confirmation of the research’s results is the analysis of the of the shear surfaces’ macrostructure of the formed composite materials. The tendency of shear surface development characteristic for materials with high indicators of cohesive strength with the change of impact strength depending on the content of polystyrene "Oasis" is revealed. After a general evaluation of the obtained data, the optimal content of filler in the formation of composites with improved cohesion and adhesion properties was established.