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

Personal portfolio

STRUCTURE OF UHMWPE FILMS AFTER IRRADIATION WITH HEAVY IONS

Senatov F.S. 1 Senatova S.I. 1 Gorshenkov M.V. 1 Cherdyntsev V.V. 1
1 National University of Science and Technology “MISIS”
Ultrahigh molecular weight polyethylene (UHMWPE) films with a thickness of 40 microns were obtained by hot pressing followed by irradiation with ions Xe+26 with 167 MeV energy and ion flux of 5×107 to 1012 cm-2s-1. The obtained samples were investigated by FTIR spectroscopy. Oxidation of the polymer matrix after irradiation was studied by analysis of infrared absorption spectra. Quantitative analysis was performed by calculating the peak height of 1240 cm-1 and normalized to an internal standard. It is shown that the lowest oxidation index (less than 1) is observed in UHMWPE films irradiated with heavy ions with a flux (5-7)×107 cm-2s-1. The most pronounced oxidation of the polymer occurs at a flux of 1012 cm-2s-1. Oxidation of the UHMWPE film can lead to loss of performance. Scanning electron microscopy shows that the method of irradiation of films with heavy ions with flux to 109 cm​​-2s-1 followed by etching 10M NaOH + 5 % wt KMnO4 for 1 hour at a temperature of 80 °C allows to obtain an average pore size of 80 nm without significant oxidative degradation.