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The influence of additive nature as well as its ratio on the rheological, tribological and technological properties of blends based on ultra-high molecular weight polyethylene has been determined. The energy costs impact in the polymer blends processing has been studied. It is shown that the rheological and tribological properties of the samples have a complicated dependence, which is determined by inhomogeneity of the system.

The purpose of this work is to investigate the thermodynamic properties of the solubility of methyl 6-methyl-2-oxo-4-phenyl-1,2,3,4-tetrahydro-pyrimidine-5-carboxylate, which exhibits a wide spectrum of biological activity in organic solvents of different polarity and their character of mixing. As you know, the processes of synthesis and purification of solid substances, allmost, occur with the help of individual solvents or their mixture, so optimization of these processes is impossible without determining the thermodynamic parameters of their dissolution.