Structure and Properties of the Welded Joints of Single-Type Polyethylenes Formed Under the Action of Constant Magnetic Fields

摘要

We study the structural features and the thermomechanical and operating properties of the welded joints of PE-80-PE-80 with PE-100-PE-100 made with and without the action of constant magnetic fields (B similar to 1 T). By using the wide-angle X-ray diffraction method, it is shown that the action of a transverse constant magnetic field on the melts of polyethylene specimens of the same type in the course of their welding causes the formation of an oriented structure of the welded joint. The axis of its texture coincides with the direction of the magnetic field, which improves the thermomechanical and operating properties of welded joints. The formation of a welded joint under the action of a longitudinal magnetic field leads to the deterioration of its physicomechanical characteristics, which is explained by the opposing action of the force field that formed in the process of welding and compensating the effect of the magnetic field.