Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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DEFORMATION CHARACTERISTICS OF UHMWPE FILMS IN TENSION TESTS

Сherdyntsev V.V. 1 Senatov F.S. 1 Maksimkin A.V. 1 Stepashkin A.A. 1
1 National University of Science and Technology “MISIS”
UHMWPE films with average thickness of 150 microns were obtained by methods of termopressing of powder and molding of gel. Mechanical properties of UHMWPE films and the structure of the films obtained by various methods, including orientational drawing, were studied by IR-spectroscopy. Tensile tests have shown that the value of the tensile strength of UHMWPE films obtained by termopressing of powder is higher than the tensile strength of bulk samples on 57%. Adding xylol and gel formation leads to a decrease in the interaction between UHMWPE macromolecules and an increase in their mobility, and in combination with stretch orientation leads to an increase in tensile strength in 3 times. The change in the structure of the films associated with the orientation stretching, indirectly confirmed by an increase in the height of the crystallinity line on 43% relative to UHMWPE film without orientation. Simultaneously with the increase in the tensile strength of UHMWPE oriented films obtained from the gel, there is a significant decrease in the value of elongation at break.