Influence of Silicon Oxide and Diabase Powders on the Degree of Crystallization and Chemical Structure of a Polymer (Uhmwpe) Coating Produced by the Method of Gas Thermal Spraying

Abstract

The polymer coating layer was obtained by adding SiO 2 powder and diabase to the composition of ultra-high molecular weight polyethylene and spraying it with a gas flame. The effect of mineral additives on the chemical composition and phase transition of the obtained coatings was explained by the methods of X-ray phase and infrared spectral analysis. X-ray phase analysis showed that the polymer consists of an orthorhombic network, peaks (110) and ( 200), characteristic of the polymer, appear, the intensity of the line (110) of the phase in the initial pure state of the polymer coating reached 14000; decreased to 2500, with an increase in the amount of continuous SiO 2 to 40%, it can be seen that the intensity of the polymer lines decreased to 2000, on the contrary, the intensity of the lines of the hexagonal lattice (101) SiO 2 increased from 500 to influence on the intensity of polymer lines. In general, analyzing the lines of the diffraction pattern, it can be seen that the polymer melts up to 200 0 C, and given the fact that SiO 2 , as an individual mineral substance, melts at a very high temperature, it was proved by analyzing the literature and experiments confirming the absence of phase exchange between the polymer and the mineral powder consisting of SiO 2 . It has been established that spraying with the addition of 10-40% silicon oxide to the polymer composition, the absence of mutual phase exchange between the polymer and the mixture added to it does not significantly affect the crystalline structure of the coating and the degree of crystallization, the degree of crystallization is (64 ± 3)%. The results of the study of the infrared spectrum showed that the chemical structure of the polymer coating with the addition of SiO 2 in an amount of 10-40% does not change, compared to the original polymer (UHMWPE). This showed that the SiO 2 did not adversely affect the chemical structure of the polymer and that the polymer did not degrade, when it sprayed with a gas flame.