DEVELOPMENT AND IMPLEMENTATION OF PRODUCTION TECHNOLOGIES FOR PRODUCING COMPOSITE MATERIALS AND TIRES BASED ON POLYURETHANE SYSTEMS FEATURES OF POLYURETHANE RHEOLOGY

Abstract

The objects of the study were thermal polyurethane thermoplastic elastomers (PUTP), obtained by the reaction of 4,4-diphenylmethane diisocyanate, hydroxide-containing polyester with a molecular weight of 2000 (polyethylene glycol adipate) and 1,4-butadiol (industrial name VITUR). -T-1413) It was found that the dependence of the logarithm of the effective viscosity (ηeff) of the PUTEP melt on shear stress at various temperatures in the studied range of shear rates (from 1 to 100 s-1) represents parallel straight lines. This makes it possible to use the analytical dependence of the effective viscosity on temperature to describe the rheological behavior of PUTEP melts, which also takes into account the influence of shear stress on the viscosity of the melt carbon-chain and heterochain polymers are determined by many factors, such as the thermodynamic properties of the components, their molecular weight, the degree of phase dispersion, the ability of the components to crystallize, etc. Composite materials, which are reinforced or filled polymers, play an important role in technology. The development of these materials and improvement of their properties is a complex problem, in which a significant place belongs to the physical chemistry of surface phenomena in polymers. Therefore, the problems of physical chemistry of filled polymers are problems of physical chemistry of surface phenomena in polymers.