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Plasticheskie massy

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No 1-2 (2017)
https://doi.org/10.35164/0554-2901-2017-1-2

3-5 331
Abstract
It was investigated the effect of the composition HDPE - EVA and PC - LDPE blends and flow conditions at its effective viscosity and the evaluation of the composition of the surface of the extruded tape by measuring the contact angle.
6-8 398
Abstract
Сomposition diagrams for the radical homogeneous copolymerization of acrylic acid and methoxy oligo(ethylene glycol) methacrylate (with the degree of ethoxylation of 23) in aqueous solutions were obtained. For low conversions (less than 10%), the resulting copolymers were found to be enriched with methacrylic ester units for all initial comonomer ratios. Using Mayo-Lewis, Fineman-Ross and Kelen-Tüdös methods the reactivity ratios of acrylic acid (0.02-0.07) and methoxy oligo(ethylene glycol) methacrylate (1.14-1.20) were determined.
9-11 369
Abstract
The paper presents a study of the effect of explosive treatment with change of the configuration of a shock pulse and pressure in the shock front on the structure and thermomechanical properties of the composition of PTFE with a 30% of polyarylate.
12-14 278
Abstract
A method of assessing the effectiveness of the modification of PVC, designed to reduce the rate of extraction of the plasticizer. Reduce the rate of extraction depends on the conditions of modification. The proposed approach establishes the influence of modifications to the decrease in the rate of extraction.
14-17 404
Abstract
The effect of supramolecular structure of the semicrystalline polyethylene on its electret properties was studied. Smaller crystallite size of the polymer at the same degree of crystalinity was shown to result in increased amorphous/crystalline interface that acts as potential energy trap for injected charge carriers. It led to higher electret properties of the polyethylene.
17-20 429
Abstract
In article influence of molecular weight on process of an orientation extract and a complex of physicomechanical characteristics of samples of polymethyl methacrylate (PMMA) is considered. The orientation extract and increase in molecular mass of PMMA from 0,52 to 4,6 x 106 g/mol leads to the essential growth of durability and the module of elasticity (σр - by 2,6 times, E - by 2,5 times). It is established that deformation characteristics of the focused samples of PMMA increase by 10 times at increase in molecular weight from 0,52 up to 4,6 x 106 g/mol that opens new opportunities for processing of sheets and films of PMMA.
20-23 386
Abstract
It has been shown that miscibility level of polymer blend is defined by their structural state. Interdiffusion and compactization of macromolecular coils of blend components is realized for miscible blends. It has been components can be served as their miscibility characteristic. Deformability of miscible blends is larger then nonmiscible ones.
23-25 327
Abstract
Kinetic regularities of thermooxidative dehydrochlorination of rigid and plasticized PVC in the presence of 5-hydroxy-6-methyluracil have been studied. The high antioxidant efficacy of 5-hydroxy-6-methyluracil in the process of polymer degradation has been revealed.
25-28 432
Abstract
The calculation model for prediction both of storage and loss moduli is suggested. Consideration is made on the basis of the atomic constants that take into account the contribution of each atom and the polar group in the van der Waals volume and shear modulus at high frequencies. The relations obtained allow us to calculate the shear modulus, storage modulus, and loss modulus as a function of frequency, temperature and molecular weight distribution.
29-30 347
Abstract
Given a quantitative description of the effect of the cells during radical polymerization. Established a functional relationship between the efficiency of initiation rate elementary stages of radical polymerization, the viscosity of the medium, the size of the radical and temperature.
34-37 391
Abstract
The influences of silica flour, chalk and cement on the physico-mechanical and physico-chemical properties of filled polymer composites based on the statistical copolymer of polypropylene - random polypropylene is investigated.
37-39 248
Abstract
In work are considered some questions flammability wood building materials, wood-strips captive and connecting. The Revealed mechanisms chemical flammability, kinetic regularities of the process thermo destruction modified sample. On base of the using the modern methods of the fire test are revealed modes of the combustion and thermo destruction wood material. Advantage polymeric fire-retardants are shown in contrast with loimolecullyar analogue.
40-43 353
Abstract
A study of the structure and properties of friction (rubbing on steel), thermoplastic composites obtained by dispersing the components in a joint vibropomole. The relationship between the structure and wear resistance of submissions received.
44-45 305
Abstract
Parameters of hardening of composite materials on the basis of an epoxy matrix and the modified basalt thread are determined. Spectral pictures of an epoxy composite on the basis of the modified AGM-9 and Duron OS of 3151 basalt threads are investigated. Increase of physicomechanical properties of an epoxy composite on her basis is established.
46-48 265
Abstract
A comparative study of the gas barrier properties of polymeric materials with different chemical structures and compositions based on montmorillonite organomodified (OMT) polyamide-6 for use as a barrier layer for polymer pipes of hot water.
51-57 60156
Abstract
The accelerated laboratory climatic tests for samples of 4 different brands of fibreglasses were carried out and change of their fire danger characteristics according to requirements of aviation norms was investigated. Essential influence like polymeric matrix and conditions of impact on the size of change of fire danger is shown. It is noted that after influence of thermal and wet heat factors there can be more than double both improvement, and deterioration of characteristics of flammability, smoke density and heat release.
57-59 237
Abstract
In article are brought results photometric, rentgenostructirings and rheological proprieties of the studies solution clays Nurata and Navbahor layer. They are shown possibility of increasing physic-chemical and applied characteristic of the clays new water-soluble polymers.
60-62 257
Abstract
In modern wood processing enterprises a significant amount of the finished product is products made of laminated wood. Gluing operations are used for the production of plywood, boards flooring, furniture, bearing and protecting designs and especially housing construction. The main requirement for the products of laminated wood is the strength of the bond. The currently used technologies of gluing of wood joints do not meet the requirements of the customer on the strength characteristics of the finished product. In this paper the technological method is considered, which is on the basis of the effect of increasing the bonding strength of wood joints, formed on the basis of the adhesives used in wood processing subjected to modification by exposing the adhesive by constant magnetic field. The influence of the main technological factors is studied influencing the formation of adhesive joints based on adhesives modified by the influence of the magnetic field. The effect of the field strength, the time of its exposure, pressure and temperature was established experimentally. It is shown that magnetic field intensity has the dominant influence on the strength of adhesives. It was also found that during the action of the magnetic field on the glue with a hardener from 2 to 10% by weight, limit of the bonding strength is higher than for the untreated adhesive. These data shown in the research allow the creation of laminated wood with increased strength.
62-64 250
Abstract
This paper presents the experimental results of surface quality after turning polymeric materials pretreated with surfactants . Experimentally proved that pretreatment blanks surfactant provides the quality rising of a surface exposed by turning . This is evidenced by a roughness decrease from 2 to 4,5 times , with a minimum roughness achieved at a depth of cut equal to 1,0-1,15 surfactant penetration depth into the material.


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ISSN 0554-2901 (Print)