No abstract

An examination is made of the results of investigating the influence of the concentration of nanoparticles and graft copolymer (modifier) on the main physicomechanical characteristics of styrene plastics. The limiting concentrations of nanoparticles with which the maximum strength properties are achieved are determined. An interpretation of the mechanism of failure of filled polymer composites is given.

No abstract

The article is dedicated to the development of processes for (oligo)alkylation of petroleum fractions rich in aromatic hydrocarbons, with α-olefins (hexene-1, octene-1, decene-1) in the presence of ionic-liquid catalytic systems and the study of the properties of the products obtained. Alkylation reactions were carried out in the presence of chloroaluminate ionic liquids; for the first time a (nano)metal-polymer composite (NMPC) was used in the catalytic system as a modifier, and zinc chloride (ZnCl2) was used in the catalytic system as a component and the results were compared. It has been shown that these ionic liquid catalytic systems (ILCS) are suitable for (oligo)alkylation reactions and the use of these additives in their composition will lead to efficient alkylation. The products obtained were analyzed by IR-, NMR- spectroscopy, fluorescent indicator adsorption methods, and size exclusion chromatography. It was shown that these petroleum fractions rich in aromatic hydrocarbons can be used as alkylation components, and depending on the composition of the ILCS, it is possible to regulate the molecular, thermophysical and other characteristics of the products obtained based on them. The alkylated products obtained have been tested as plasticizing additives in polyolefin composites.

In order to improve the physical and mechanical properties of specimens of high-impact polystyrene, a graft copolymer of atactic polypropylene with styrene was introduced into its composition. The graft copolymer is distinguished by the fact that there is no homopolymer of the monomer being grafted, i.e. polystyrene, in its composition. It was found that, depending on the length and distribution frequency of the grafted chains, the introduction of the graft copolymer helps to improve the breaking stress, bending strength and impact strength of the composite material.