The issues of molding products from polymer materials and composites using additive technologies (ADT), which are one of the modern trends in the technology of processing polymer materials and composites into products with complex geometry of various standard sizes, are considered. It is shown that the creation of ADT is a complex scientifi c and technical task. The data on TOTAL-Z LLC, the Russian manufacturer of 3D-printers, and model range of printers are presented. The role of RTU MIREA’s Department of Chemistry and Technology of Plastics and Polymer Composites Processing, together with TOTAL-Z LLC, in the organization of the first educational and scientific center for additive polymer technologies, training and development of additive technologies is shown.

For the first time, the generalized (Θ) and normalized (a_mid/d, Θ/B, and Θ/S_f) parameters were used to describe the dispersed structures and strength properties of DFPCM for different contents of a dispersed filler with different specific surface area (S_ss) and particle diameter (d). This made it possible to determine the optimal parameters of the filler, its content and the type of dispersed structure with maximum strength. The optimal parameters of investigated system (FA + SiО₂) were: a_mid/d ≈ 0.25–0.3; Θ ≈ 0.5–0.55 b.v.; Θ/В ≈ 2.0–2.5 и Θ/S_f ≈ 0.8–1.0. They are achieved by using silica-fi ller with specific surface area Sss = 1 m²/g and particle diameter d ~ 2.25 μm, the volume content of filler was ~20–25 volume % (0.2–0.25 b.v.). The optimal structure for disperse-filled polymer composite material is middle-filled system (before yield strength). It was determined, that the optimal particle size depends on interaction between growing crack and dispersed inclusions while composite is destructed as well the length of the phase boundary (normalized parameter Θ/Sf). To sum up, it is necessary to use only generalized and normalized parameters (а_mid/d, Θ, Θ/В and Θ/S_f) to determine the optimal of dispersed fillers and the structure of DFPCM with maximum strength.

The article presents the results of a study of the rheological characteristics of dispersion-fi lled polymer composite materials (DFPCM) based on LDPE and glass balls of the ШСО-30 brand in a wide range of processing temperatures. For the fi rst time, the rheological properties of dispersion-fi lled polymer composite materials are considered from the standpoint of the formation of the dispersed phase with diff erent types of lattices, functional division of the polymer matrix (φ_p = Θ + В + М) and the construction of dispersed systems with diff erent types of structures (DS, LFS, MFS, HFS) in terms of generalized parameters (Θ, a_mid/d). This approach allows us to predict and describe the rheological properties for all DFPCMs with diff erent types of dispersed structures, using a dispersed phase (fi ller) with known geometric dimensions (d), packing density (parameter k_packing and φ_m) based on this polymer matrix. The infl uence of temperature on the processing technology of DFPCM with diff erent types of structures into products by injection molding has been established.

The effect of the composition of a liquid mixture of n-propanol with toluene on the rate of cracking in stressed polycarbonate sheets was studied. It is shown that the dependence of cracking time on stress can be described using equations in which the coefficient values depend on the ratio of the components of this test mixture. The method of wetting the surface of a sheet of monolithic polycarbonate with a test adsorption-active mixture (n-propanol with toluene) can be used not only to assess the quality of polycarbonate products, but also to measure the residual stresses in them. The conclusion is made that the influence of the investigated test liquid mixtures on the cracking of polycarbonate is multifactorial.

A brief review of the results of research on reducing the flammability of modified materials based on polycarbonate, the effect of flame retardants and additives that reduce dropping, as well as affecting the complex of properties of polycarbonate is presented. The optimal concentrations of modifying additives for obtaining fire-resistant compositions with high optical characteristics have been determined. It is shown that to achieve the maximum flammability category (PV-0 at a thickness of 2 mm) and oxygen index (42.3%) for thin-walled products, it is necessary to use a high- viscosity grade of polycarbonate (MFI 2.5±1.0 g/10 min), alkali metal sulfonates as a fire retardant and an anti-dripping additive.

The influence of the type of organic solvent, the acidity index, and the content of MF-12 methylphenyl organosilicon oligomer on the gelation time during polycondensation for the manufacture of heat-resistant electrical insulating materials is considered. The choice of the type of solvent that provides the best viscosity characteristics during impregnation and the greatest stability of the properties of the binder intended for use in combination with selective latent polycondensation catalysts, which exclude the effects of undesirable processes in the production and storage of pre-impregnated materials, has been justified.

The processes of decomposition of a porophore (azodicarbonamide) and foaming with its use of polyvinyl chloride compositions with different melt viscosities have been investigated and compared. The change in the viscosity of the PVC melts in the range from 5000 to 70,000 Pa·s was carried out by filling (with chalk) and plasticization (with dioctylphthalate). A general mathematical model that describes and relates the kinetics of gas evolution during the decomposition of porophore and foaming of polymer melts with different viscosities has been developed.

It has been found that the use of certain types of thermoplastic elastomers as a co-extruded coating of the inner surface of plastic pipe systems can significantly increase the lifetime of pipeline hydrotransport when exposed to hydraulic mixtures, in particular tailings of iron ore processing. The comparison of polyethylene and steel pipes resistance to water-jet wear is made. The influence of the concentration, dispersion, and speed of hydraulic mixtures on the wear rate is estimated.

A brief historical summary of the formation of the Department of plastic processing technology at the Moscow Mendeleev Institute of chemical technology is given.

The Department for plastics processing was established by order of the Ministry of education in 1960 at the Mendeleev Moscow Institute of chemical technology. In 2020, the Department of plastics processing technology of the Mendeleev Russian state technical University celebrates 60 years since its foundation. A brief overview of the history of the Department's formation is presented.

Cardo- phenolphthalein formaldehyde resin was studied as a binder of antifriction organoplastics. The role of the phthalide cycle in the structure of the polymer during its curing process is shown. Experimental data on the effect of processing temperature on the tribological and thermofriction properties of organoplastics reinforced with polyoxadiazole fiber are presented.

One of the methods for increasing the impact toughness of materials based on epoxy resins is modification with thermoplastics. The paper presents experimental data on the effect of polyvinyl formal ethylal (Vinyfl ex) and various curing modes on the toughness of compositions based on ED-20. The mechanism for modifying ED-20 with Vinyflex was analyzed. The data obtained are necessary for the development of domestic technology for the production of impact-resistant plastics.

Modern thermal control systems equipped with computers, are able to solve a variety of tasks in product quality control. On the example of experimental data obtained during the research of thin-layer polymer coatings on metal bases, the methodological capabilities of the non-destructive method and the measuring system of thermal control are shown.

The paper presents the results of studies of the influence of carbon nanotubes (CNTs) on radio engineering (reflection coefficient), electrophysical (surface electrical resistance), thermomechanical and strength properties of fiberglass based on epoxy binder. The compositions and technological parameters of the manufacture of fiberglass samples are proposed. The change in the electrophysical and radio technical characteristics of fiberglass samples with increasing concentrations of CNTs is shown.

The analysis of fracture of composite materials based on aramid fabrics and epoxy binders with different viscosities under impact is carried out. The dependence of impact resistance on the location of the reinforcing elements and the viscosity of the binder is shown.

The application of the acoustic method and the Vickers microhardness test allow obtaining information on the effect of processing conditions on the morphological features and properties of products made of ultra-high molecular weight polyethylene.

The physicomechanical and technological properties of polypropylene-based composites filled with basalt fibers (BF) and glass microspheres (GM) are studied. It is shown that the introduction of short BFs and glass microspheres into PPs while ensuring good “fiber-matrix” adhesion by adding maleic anhydride-grafted polypropylene (MAPP) leads to a significant increase in the elastic modulus and tensile yield strength. The impact strength of composites improves with increasing fiber content in the presence of GM. The melt index and thermomechanical stability of the developed composites increase.