Halogenated polyethersulfone sulfides

This paper presents the results of a study of random copolyethersulfone sulfides based on 4,4-dichlorodiphenylsulfone, 1,1-dichloro-2,2-di(4-hydroxyphenyl)ethylene, and sodium sulfide. The synthesis of copolyethersulfone sulfides with different ratios of polyethersulfone and polyphenylenesulfone sulfide units was carried out by high-temperature polycondensation by the reaction of nucleophilic substitution in N,N-dimethylacetamide medium and using potassium carbonate as an alkaline agent. The effect of the solvent used on the yield and reduced viscosity of polyethersulfone sulfides was studied. It has been shown that polymers with high reduced viscosity can be obtained in N,N-dimethylacetamide and N,N-dimethylformamide. The growth dynamics of the reduced viscosity of polyethersulfone sulfides was also studied depending on the ratio of sulfone and sulfide groups. The solubility of these polymers in various solvents has been studied

Influence of the compatibilizer on the properties of composites based on low density polyethylene and polybutylene terephthalate

Composite materials based on a polymer mixture -low density polyethylene and polybutylene terephthalate -have been obtained and investigated. To improve the compatibility of two thermodynamically incompatible polymers, a compatibilizer was used, which is polyethylene modified with maleic anhydride. It was found that the compatibilization of the polymer mixture low density polyethylene/polybutylene terephthalate, leads to a significant change in the basic physical and mechanical characteristics of the composite. It is shown that the introduction of compatibilizer leads to an increase in the viscosity of the polymer mixture, which is caused by a change in the density of molecular entanglements. In turn, compatibilized composites are inferior in hardness to noncompatibilized composites. It was found that changes in the morphology of composites upon compatibilization lead to an improvement in the strength of the material. It was shown that the plasticity of the polymer mixture increases upon compatibilization, which makes it possible to improve the dissipative capabilities of the material

Investigation of dielectric parameters of structural nanocomposites based on polyethylene

The dependence of the dielectric constant and specific volume resistance of a structural composite based on (80 wt%) synthetic isoprene rubber and (20 wt%) low density polyethylene on the content of nanosized particles of aluminum fillers, Nalchikin and carbon black in small quantities is shown graphically. Using an electron probe method for studying the microstructure of a structural material, a hydrostatic weighing method based on determining the density of a composite by its double weighing and an electron shadow microscope, this paper presents models and physical mechanisms that lead to extrema in the permittivity and conductivity of composite materials

Halogenated polyethersulfone sulfides

This paper presents the results of a study of random copolyethersulfone sulfides based on 4,4-dichlorodiphenylsulfone, 1,1-dichloro-2,2-di(4-hydroxyphenyl)ethylene, and sodium sulfide. The synthesis of copolyethersulfone sulfides with different ratios of polyethersulfone and polyphenylenesulfone sulfide units was carried out by high-temperature polycondensation by the reaction of nucleophilic substitution in N,N-dimethylacetamide medium and using potassium carbonate as an alkaline agent. The effect of the solvent used on the yield and reduced viscosity of polyethersulfone sulfides was studied. It has been shown that polymers with high reduced viscosity can be obtained in N,N-dimethylacetamide and N,N-dimethylformamide. The growth dynamics of the reduced viscosity of polyethersulfone sulfides was also studied depending on the ratio of sulfone and sulfide groups. The solubility of these polymers in various solvents has been studied

Investigation of dielectric parameters of structural nanocomposites based on polyethylene

The dependence of the dielectric constant and specific volume resistance of a structural composite based on (80 wt%) synthetic isoprene rubber and (20 wt%) low density polyethylene on the content of nanosized particles of aluminum fillers, Nalchikin and carbon black in small quantities is shown graphically. Using an electron probe method for studying the microstructure of a structural material, a hydrostatic weighing method based on determining the density of a composite by its double weighing and an electron shadow microscope, this paper presents models and physical mechanisms that lead to extrema in the permittivity and conductivity of composite materials

Influence of the compatibilizer on the properties of composites based on low density polyethylene and polybutylene terephthalate

Composite materials based on a polymer mixture -low density polyethylene and polybutylene terephthalate -have been obtained and investigated. To improve the compatibility of two thermodynamically incompatible polymers, a compatibilizer was used, which is polyethylene modified with maleic anhydride. It was found that the compatibilization of the polymer mixture low density polyethylene/polybutylene terephthalate, leads to a significant change in the basic physical and mechanical characteristics of the composite. It is shown that the introduction of compatibilizer leads to an increase in the viscosity of the polymer mixture, which is caused by a change in the density of molecular entanglements. In turn, compatibilized composites are inferior in hardness to noncompatibilized composites. It was found that changes in the morphology of composites upon compatibilization lead to an improvement in the strength of the material. It was shown that the plasticity of the polymer mixture increases upon compatibilization, which makes it possible to improve the dissipative capabilities of the material