The stages of formation of the scientific school of chemical technology of plastics at the St. Petersburg State Technological Institute (Technical University) are analyzed. The main directions, results of scientific and pedagogical activity, research topics are shown.

The article describes the main characteristics of polymeric materials that affects their compatibility, types of polymer blends and features of their morphology, and the main mechanisms of combination (compatibilization) of polymers.

A comparative analysis of a magnesium-zinc stabilizer based on pentaerythritol and a standard calcium-zinc stabilizer based on stearic acid was carried out. The influence of the ratio of pentaerythritol magnesium (PenMg) to pentaerythritol zinc (PenZn) on the thermal and thermo-mechanical stability of polyvinyl chloride (PVC) is considered.

Two photocuring mechanisms for liquid systems for 3D printing are presented. Their features and characteristic classes of compounds are highlighted. The main elements of a photopolymerizable composition (FPC) for each of them are described. The strengths and weaknesses of the main types of compounds for each basic component of the photocurable system are revealed.

The influence of titanium dioxide filler on the physical, mechanical and dielectric properties of epoxy-novolac foams of the PEN-I brand has been studied. The dependences of the apparent density, thermomechanical characteristics, and water absorption of structural foams depending on the filler content are analyzed. It is established that by introducing dispersed additives, it is possible to regulate the dielectric constant within specified limits and with high accuracy.

Filling compositions based on epoxy-diane resin have been developed, the curing process using polyesteramides has been investigated, and the activation energies of the curing reaction have been calculated. The effect of increasing the amount of PET on the thermal characteristics and physico-mechanical properties of filling compositions is shown. The test results show that the filling compositions obtained using the developed polyesteramides are superior in properties to compositions based on industrial amine hardeners.

A method for the obtaining of polyesteramides based on recycled polyethylene terephthalate (PET) is presented. The process of aminolysis is studied by FTIR spectroscopy. The eff ect of increasing the duration of the aminolysis process and the amount of PET on the complex of technological properties of polyesteramides is shown. According to the test results, the developed polyesteramides can be used as hardeners for epoxy oligomers.

The study of polyacrylimide foams based on compositions of polyacrylamide hydrogels containing hollow corundum microspheres as fillers was carried out. The effect of fillers on the physical and mechanical properties and thermal stability of polyacrylimide foams has been studied. The structure and morphology of the obtained foam materials were studied by scanning electron microscopy, and the average cell size was established.

Methods for regulating the properties of polymer composite materials based on epoxy, epoxy-novolac and polyurethane matrices are considered. The results of studies on the application of glass and aluminosilicate microspheres as fi llers are presented.

A method for obtaining an unsaturated polyester resin based on recycled polyethylene terephthalate has been developed. The process of curing an unsaturated polyester resin under the action of styrene, a peroxide compound (Butanox 50M) and an accelerator (cobalt stearate and dimethylaniline) has been studied. The physical and mechanical properties of polymeric materials based on the developed resin have been studied. It has been established that their strength depends on the mass fraction of recycled polyethylene terephthalate in the oligoether polyol used in the synthesis.

The main directions for obtaining copolymers and polymer compositions based on polyvinyl alcohol, N-vinylsuccinimide, N-vinylsuccinamic acid and their polymer analogs, which have biological activity, are suitable for modifying physiologically active substances (PAS) and provide their prolonged action, are presented.

The accelerating effect of adding a low molecular weight sulfonic acid surfactant (alkylbenzenesulfonic acid) and nonionic or containing sulfonic acid units amphiphilic copolymers of methoxy- and higher alkoxyoligo(ethylene glycol)methacrylates on the synthesis of a promising cationic monomer, N-(dibutylaminomethyl)methacrylamide, proceeding in an aqueous-amine emulsion, by the Mannich reaction, was revealed. The infl uence of the concentration of additives and the structure of copolymers on the catalytic effect is shown.

The article presents the results of a systematic analysis of the electrical conductivity of nanocomposites based on high density polyethylene and carbon fillers such as carbon black and graphite. 13 nanoscale carbon fillers are used. The aim of the study was to select the most effective nanofillers from among the various types used. The efficiency of nanoparticles was evaluated not only by electrical conductivity data, but also by changes in the main physical and mechanical parameters. Such characteristics as electrical conductivity, breaking stress, elongation and melt fl ow index were studied. It is shown that the best nanofillers are Printex XE 2B carbon black and GS-2 graphite.