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V. L. Demchenko, M. V. Iurzhenko
«Features of Nanostructural Organization, Properties, and Behaviour of Welded Joints of Polyethylenes Relaxation»
535–546 (2017)

PACS numbers: 06.60.Vz, 61.05.cf, 61.05.cp, 81.05.Qk, 81.07.Nb, 81.20.Vj, 81.70.Pg

The paper is concerned with a complex studies of structure, its relaxation behaviour, thermal and thermomechanical properties of the welded joints of the PE-80/PE-100 polyethylenes formed by conventional heated-tool butt-welding method. The results of investigations confirm that the welded joint, in which structure recrystallization of crystalline phase of polymers undergoes, is formed during the process of welding of two different polyethylene types. With time, the relaxation of the crystalline structure, namely, transition of crystalline modification from the alpha-form to the mixed alpha-beta-form, occurs that is manifested in their properties.

Key words: polyethylene, PE-80, PE-100, heated-tool butt-welding, welded joint, relaxation.

https://doi.org/10.15407/nnn.15.03.0535

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