The interrelation of physico-mechanical and technological characteristics of newly created nanocomposites on the basis of polypropylene (PP)/polyamide (PA-6) mixture with PVP-modified montmorillonite has been investigated. The significant impact of modified polyamide on technological, physical and mechanical properties and heat resistance of polypropylene has been determined. It has been established that the melt flow index of the resulting composites increases by more than 2 times, compared with pure PP. The hardness, modulus of elasticity and heat resistance of composites were found to be considerably increased in comparison with pure PP due to polypropylene mixing with modified polyamide. At the same time, the percent elongation and the forced-elastic strain of composites are reduced by 2 times.

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 paper takes into consideration the influence of the friction coefficient of material and the viscosity of its melt on energy costs during processing by injection molding or extrusion

The technological and physical and mechanical properties of extrusion raw material for the production of polyethylene pipes of different manufacturers are research. It is determined that the dependence of composition-property is being defiined not only by the characteristics of the initial polymer raw material but also by the conditions of the mixture processing. The possibility of improving the machinability of extruded polyethylene of low fluidity by mixing it with a higher fluidity polyethylene brand has been proved. The optimum composition content on the basis of polyethylene mixtures, having sufficient manufacturability for processing of raw materials by extrusion has been grounded. Кеу words: extrusion, water pressure pipes, polyethylene, mixture, index of melt flow, tensile strength, flow curves.

The main physical-mechanical and thermophysical characteristics of composite materials based on epoxy resin ED-20 and peroxide resin ED-20P (modified with tert-butyl hydroperoxide ED-20 of a molecular weight 480) in the ratio of 30 mass parts of ED-20P to 70 mass parts of ED- 20 and unsaturated oligoester TGM-3 were researched. Butyl methacrylate was used as the active diluent of epoxy-oligoester mixtures. The polyethylene polyamine was used as hardener in a steochemical ratio. For the comparison we studied compositions which did not contain ED-20P resin. The advantage of compositions included ED-20P modified resin has been shown.

The impact of the vinyl monomers nature, concentration, and temperature on the kinetics of dispersion polymerization in the presence of polyvinylpyrrolidone was studied. The optimal technological parameters of the copolymer synthesis process are determined. It is defined that the properties of dispersion polymerization depend on the process conditions. Such conditions are temperature, monomer and aqueous phase ratio, monomer and initiator concentrations and as well as the amount of polyvinylpyrrolidone. Presented materials derived on the ground of the developed compositions are characterized by principally high working and physical-mechanical properties.