Effect of strong constant magnetic field on the nanostructural organization and prop erties of the welded joints of hard-to-weld polymers (like polyethylene – polypropylene)

Abstract

Peculiarities of nanostructural organization, thermomechanical and performance characteristics of the welded joints of hard-to-weld polymers (like polypropylene-polyethylene) formed under the effect of strong constant magnetic field (B ~1 Т), as well as without such effect, were investigated by WAXS, SAXS, thermomechanical analysis and mechanical testing methods. It was determined that strong constant magnetic field causes formation of the oriented structure of the welded joint, where the axle of structurization coincides with the field axle. This effect reveals in improvement of the thermomechanical and the performance characteristics of the welded joints. Basing on the mechanical tests results it was founded that tensile strength of PE-80/PP-80 joint welded under the effect of constant magnetic field (acting transversally to the welding axle) is 12 MPa, and of welded without magnetic field effect is 6 MPa.