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Plasticheskie massy

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No 1-2 (2019)
https://doi.org/10.35164/0554-2901-2019-1-2

3-5 435
Abstract
The kinetic characteristics of oligomer resin ED-20 cured have been identified. It found that the curing reaction is approaching the first-order processes as the temperature increases. We got the relationship equation of viscosity and oligomer resin physics and chemical characteristics: high molar mass, density, mass fraction of cured product.
6-8 566
Abstract
It has been studied the dielectric properties of UHMWPE nanocomposites with a-SiO2 in a wide range of temperature (20-170°С) and frequency (25·106 Hz). It is shown that, the nanocomposites based on UHMWPE and a-SiO2 lead to a gradual decrease in tgd on lg v and lgsас on Т. The changes in eg and tgd of UHMWPE within dispersion by nanoparticles of a-SiO2 are explained on the base of three-phase structure of permolecular formations in PE.
9-12 434
Abstract
High-impact extended study has been performed for commercial specimens of various manufacturers announced their products as having environmental stress crack resistance (ESCR HIPS). The specimens under the study revealed their chemical resistance to be within the wide range, practically from 12 to 88 %. Besides, physical and mechanical properties, structural parameters and composition of ESCR HIPS were compared to the chemical resistance ratio. Electronic microscopy was found to be as the most informative method of structural analysis enabling to reveal differences in the studied specimens.
13-17 340
Abstract
The effect of the parameters of the mixing process on the regularity of concentration of carbon black particles at the interface between polymer components in mixtures of polyethylene with polystyrene is studied. Concentration of the filler at the interface is facilitated by a decrease in shear stress, viscosity of polymers, particle size of the filler.
18-21 4156
Abstract
The structure of phenolformaldehyde oligomers, modified with imidazolines based on distilled natural oil acids and polyamines - diethylenetriamine, triethylenetetraamine, polyethylenepolyamines by method of IR- spectroscopy have been studied. Explanations and conclusions have been made as a result of comparison of the spectra of the final products with those of the original components. The presumed mechanism of the reactions has been offered.
24-26 463
Abstract
Mathematical models of thermo-sets hardening kinetics and viscosity increasing in the process of hardening are generalized in this paper. The main conclusions are based on the analyze of measurement units in the main correlations. Obtained results may be used for values of viscosity calculations.
27-30 345
Abstract
The problem of the choice of ingredients of polymeric composition on the basis of the indistinct analysis of their properties is considered. The solution of this task in relation to fire-retarding agents and fibrous fillers is given.
31-36 342
Abstract
It is established that the filling with graphenes reduces the compressive strength, abrasion resistance, and also resistance to aggressive liquids (conc.HNO3), chloromethylene and a mixture of acetone and ethyl acetate). The probable reason for this is that the author sees the features of the plate structure of graphene, prone to deactivation (self-rotation) of particles and therefore sensitive to the technology of its kneading in resin when cured. At the same time, there is a important increase (by 1.3-1.8 times) in the strength at normal adhesion separation of the glued steel cylinders. Studies have shown the limited positive effects of graphene as a filler of epoxides, although its introduction can significantly improve certain practical characteristics (adhesion, thermal and electrical conductivity).
37-39 510
Abstract
The properties of polymer composite materials based on epoxy oligomers containing solid and elastic fillers are studied. The change in deformation-strength and thermomechanical properties is analyzed depending on the type and amount of filler in the composition of the composite. The difference in the properties of polymer composites filled with elastomers and containing solid fillers is shown. The dependence of the rate of reversible deformation on the type and content of the filler in the epoxy polymer is analyzed.
40-43 453
Abstract
Received modified montmorillonite alkyldimethylbenzylammonium chloride and studied its structure. Composites based on polyamide-6 and a modified montmorillonite prepared by melt mixing on a twin-screw extruder "JiangsuXindaScience The structure of the materials studied by IR spectroscopy & Technology" firm. It is shown that as compared with the unfilled polyamide-6, modulus, toughness, composites flow rate increases and the combustion time and the flame propagation velocity is decreased.
44-47 464
Abstract
Influence of temperature on electrical resistivity of amorphous ABS and crystalline PE alloys filled with carbon black was investigated. It was shown that temperature dependence of electrical resistivity is determined by melting point of polyethylene in amorphous matrix.
48-51 337
Abstract
Inflammability of the composite polymeric coverings inflicted on various types of the bases under the action of radiative heat flux of various intensity was investigated. Critical values of the thickness for various systems of coverings providing their fireproof application from the point of view of influence of radiative thermal loadings were revealed.
52-56 400
Abstract
The main requirements for technological and physic-mechanical properties of SMC-material was formulated. Such materials are used for manufacturing by high-performance pressure method of products of interior and exterior of transport objects. The materials, developed by VIAM Federal State Unitary Enterprise meet the put requirements and correspond on level of properties to the best foreign analogs was shown. The nondestructive control methods of products from SMC-materials was offered.
57-59 484
Abstract
The results of practical experimental data on increasing the resistance to UV radiation of industrial fiberglass reinforced plastic products based on epoxy anhydride binder modified with additives of polymethylene esters of phenols and boric acid and light stabilizers based on benzophenone and benzotriazole are presents in the article. The specifics of the application of these additives in production are reflected. The results of accelerated aging tests of the obtained samples in weathering tester are shown.
60-62 402
Abstract
Thermoprotective coatings with enhanced deformation characteristics were created on the basis of polyetherurethane rubber with terminal epoxyurethane groups and epoxy oligomers, as well as on the basis of epoxyurethane oligomer and amino-functional organosilicon oligomer for use in a wide temperature range. Explored the laws of curing of coatings and determined their mechanical characteristics at various temperatures.
63-65 394
Abstract
In work findings of investigation of influence of a technological mode of extrusion are resulted: concentration of filler, and also a temperature schedule and pressure of extrusion and upon productivity of an extruder-amalgamator of nanocomposit stuffs on a basis thermoplastic copolymers of propylene with ethylene and connatural mineral fillers of deposits of Azerbaijan.
66-69 612
Abstract
A detailed analysis of the sources of formation of polymeric wastes and the degree of their availability in Russia was carried out. The flowcharts for processing various groups of polymeric wastes are presented. Describes the main stages of recycling of electrical and electronic equipment waste (WEEE). The prospect of the formation of a potentially possible amount of plastic waste from various sources in Russia is presented. The approximate prices for polymeric waste are given.
70-72 351
Abstract
Microtechnology researches on model samples of three-layered wood-shaving plates and used for their production binding by method of raster electronic microscopy on microscope of "Karl Zeiss Jena" are conducted. The condition of the cured mass of hot pressing of plates, binding at temperatures, 170 - 180o is established to Page.


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ISSN 0554-2901 (Print)