ИССЛЕДОВАНИЕ ВЯЗКОСТИ БРОМСОДЕРЖАЩЕГО ПЛАСТИФИКАТОРА ИЗ ОТХОДОВ ПРОИЗВОДСТВА

Abstract

The importance of studying the viscosity parameters of liquid ingredients of plastics and elastomers for solving a number of technological issues related to taking into account the energy costs required to perform basic and auxiliary production operations in the processing of polymer materials is noted. The influence of the degree of halogenation of unsaturated mixed plasticizer obtained from industrial waste on its viscosity in the temperature range corresponding to the technological parameters of processing polymer materials 273-393 K. It is shown, that with an increase in the degree of bromination at a constant temperature the viscosity of the bromine-containing plasticizer increases by 63.3%, 52.0% and 46.8%, respectively. With an increase in temperature to 353-393 K, a decrease in the maximum viscosity values for samples with a mass fraction of bromine of 14.4% by 26% was found. It is shown that in the studied range of the degree of bromination, the viscosity drop with an increase in temperature to 393 K is 96%. An equation is proposed to evaluate the effect of the degree of bromination and temperature on the viscosity of a mixed bromine-containing plasticizer of the phthalate type, obtained from production waste. The values of its coefficients in a given temperature range are established, which characterize the change in the intensity of intermolecular interaction with an increase in the bromine content in the plasticizer. It is shown that the activation energy of the viscous flow decreases by 12% with an increase in temperature and an increase in bromine content. The heat of evaporation of the plasticizer components within 100 kJ/mol was determined. The value of a complex indicator is obtained, taking into account the combined effect of bromine content and temperature on viscosity in the range of 25-26 kJ/mol, which confirms the provisions of the activation theory for linear low-molecular hydrocarbons. It was found that the degree of influence of the bromine content in the plasticizer on its viscosity in the established temperature range is 3.3 – 4.1%. It is shown that an increase in the degree of bromination of a phthalate-type plasticizer contributes to an additional intermolecular interaction that contributes to an increase in kinematic viscosity.