Back SearchTitle: EFFECT OF HEXAAZOCYCLANES ON THE MICROSTRUCTURE OF POLYETHYLENE TEREPHTHALATE
Page Range: p.T/1-T/4
Author(s): Burykina O V; Niyazi F F
File size: 97K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The effects of the addition of various proportions of hexaazocyclane dyes on the microstructure and fibre formation of poly(ethylene terephthalate) were investigated by optical microscopy, DTA and dielectric loss tangent measurements. The results are discussed in terms of plasticisation effects, crystal form and the degree of crystallinity. 2 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.7-9)
Title: CAPILLARY SORPTION OF WATER, SWELLING, AND MOISTURE PERMEABILITY OF POLYCAPROLACTAM
Page Range: p.T/5-T/8
Author(s): Belokurova A P; Rodicheva Y A; Ziyadova T F; Burmistrov V A
File size: 86K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The capillary sorption of water, swelling and moisture permeability of industrially manufactured microporous poly(caprolactam) fibre membranes of different average pore sizes in water and deuterium oxide was investigated experimentally by gravimetric techniques. The kinetics of swelling were determined, and the results are discussed in terms of the effects of porosity on effective moisture permeability and water vapour diffusion. 5 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.9-11)
Title: EFFECT OF UV RADIATION AND TEMPERATURE ON THE MOLECULAR CHARACTERISTICS OF NYLON-6 AND POLYACRYLONITRILE
Page Range: p.T/9-T/11
Author(s): Barkhudaryan V G; Sarkisyan A G
File size: 70K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The effects of UV irradiation and high temperatures in air for various time periods on the molecular characteristics of films of nylon-6, its textured analogue and polyacrylonitrile prepared by hot pressing were investigated by intrinsic viscosity, viscosity-average molecular weight, and gel content measurements. The results are discussed in terms of simultaneous processes of degradation and crosslinking leading to the formation of three-dimensional networks as a function of treatment time. 21 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.12-14)
Title: EFFECT OF ALKALI METAL LACTAMATES ON THE STRUCTURE AND PROPERTIES OF COPOLYAMIDES BASED ON EPSILON-CAPROLACTAM
Page Range: p.T/13-T/15
Author(s): Barnyagina O V; Galibeev S S; Arkhireev V P; Kochnev A M
File size: 58K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The synthesis of copolyamides based on epsilon-caprolactam and various proportions of 1,6-hexamethylene diisocyanate was investigated using sodium lactamate, sodium pyrrolidone and lithium caprolactam as anionic polymerisation catalysts. The products were characterised by melting temperature, softening temperature, residual epsilon-caprolactam monomer, strength and elongation at break measurements, and the effects of catalyst type on physicomechanical and thermophysical properties of the products are discussed. 6 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.14-15)
Title: FEATURES OF PLASTICISER ABSORPTION BY POLYVINYL CHLORIDE OF DIFFERENT POROUS STRUCTURE
Page Range: p.T/17-T/19
Author(s): Gutkovich S A; Grishin A N
File size: 95K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The process of capillary penetration and matrix diffusion by plasticiser in poly(vinyl chloride)(PVC) of different porous structures is reviewed in terms of the formation of inhomogeneous ‘fish-eye' morphology. The effects on porosity of the use of monomer-soluble secondary emulsion stabilisers to prevent aggregation of globular PVC particles during suspension polymerisation are discussed in terms of morphological homogeneity and rate of penetration of plasticiser. 6 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.15-17)
Title: STUDY OF THE MODIFYING PROPERTIES OF SOME EPOXY COMPOUNDS OF THE ACETYLENE SERIES
Page Range: p.T/21-T/23
Author(s): Veliev M G; Ishchenko N Y; Chalbieva A Z; Askerov O V; Mamedova A F
File size: 62K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The curing characteristics of epoxy resins based on bisphenol A with polyethylenepolyamine as curing agent and various proportions of monoepoxy compounds containing acetylenic groups as modifiers was investigated by DTA, and the optimum amount of modifier was determined from the TG curve and estimated from the activation energy of decomposition. The effects of the modifiers on the physicomechanical properties of the epoxy resins were studied and the results are discussed in terms of additional crosslinking by the acetylenic bonds during the curing process. 10 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.21-22)
Title: PHYSICOMECHANICAL AND ELECTROPHYSICAL PROPERTIES OF GRAPHITE-FILLED ALKYD RESIN
Page Range: p.T/25-T/27
Author(s): Dubrovina L V; Ogenko V M; Gorbik P P; Svistova E I
File size: 59K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The electrophysical and physicomechanical properties of composite alkyd resin coatings containing various proportions of colloidal graphite as conductive filler were investigated by FTIR, surface resistivity, volume resistivity, elongation at break and tensile strength measurements. The effects of film thickness and graphite concentration on tensile properties were studied and the results are discussed in terms of through-the-thickness inhomogeneity of structure and properties. 9 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.22-24)
Title: PRODUCTION AND PROPERTIES OF NEW COMPOSITE MATERIALS BASED ON ACETYLATED WOOD AND ALUMINIUM COMPOUNDS
Page Range: p.T/29-T/32
Author(s): Ignatova N V; Novozhenov V A; Efanov M V; Kotvanova M K
File size: 59K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The preparation of composite materials based on acetylated pinewood sawdust, derived by treatment of activated sawdust with acetic anhydride in the presence of ammonium sulphate catalyst, with various proportions of aluminium, aluminium chloride or aluminium hydroxide as mineral filler is described. The products were characterised by XRD, FTIR, electrical resistivity, tensile strength and TGA, and the effects of filler content on properties are discussed. 6 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.24-26)
Title: MICROCOMPOSITE MODEL OF DIFFUSION OF GASES IN SILANE-SILOXANE BLOCK COPOLYMERS
Page Range: p.T/33-T/36
Author(s): Khalikov R M; Dolbin I V; Kozlov G V; Zaikov G E
File size: 95K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
Structural analysis of silane-siloxane block copolymers based on various proportions of poly(vinyltrimethylsilane)(PVTMS) and poly(dimethyl siloxane)(PDMS) was investigated using gas diffusion coefficients within the framework of Nilsen's model of transfer processes for filled systems in which the block copolymer is regarded as a microcomposite in which PDMS is the matrix and PVTMS is the filler. The results are discussed in terms of the effects of copolymer composition on permeability processes. 8 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.27-29)
Title: MONITORING THE PROCESSES OF DEFORMATION AND FAILURE OF SOLID POLYMERIC MATERIALS FROM THE PARAMETERS OF ACOUSTIC EMISSION SIGNALS
Page Range: p.T/37-T/40
Author(s): Rekov O Y; Gavrilova A V
File size: 87K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The processes of deformation and failure of commonly used thermosetting and thermosoftening plastics, including fluoroplastic, polycaprolactam, organic glass, Getinaks resin-dipped laminated plastic insulating material, and resin-dipped fabric laminate, under uniaxial elongation were investigated by acoustic emission techniques. The results are discussed in terms of determination of the onset of ductile cracking causing failure in brittle materials or of the forced elasticity limit in plastic materials together with the corresponding load. 9 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.29-31)
Title: PROPERTIES OF FIBROUS NON-WOVEN MATERIALS CONTAINING TWO-COMPONENT FIBRES
Page Range: p.T/41-T/43
Author(s): Savel'eva E K; Bokova E S; Andrianova G P; Dedov A V
File size: 105K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The fabrication of fibrous non-woven materials based on a mixture of poly(ethylene terephthalate) and core-shell two-component fibres with a polypropylene shell and a poly(ethylene terephthalate) core by mechanical methods with subsequent needle punching and heat treatment under various conditions is described. The materials were characterised by volume density, absorption capacity for water and kerosene, tensile strength and elongation at break, and the effects of heat treatment on mechanical and sorption properties are discussed. 4 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.42-44)
Title: DEVELOPMENT OF COMPOSITES FOR THE COLOURING OF TRANSLUCENT POLYMERIC MATERIALS
Page Range: p.T/45-T/47
Author(s): Sorokina A V; Panov Y T; Fridman O A
File size: 59K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The development of a procedure for formulating mixtures of dyes in order to achieve the required colouring in translucent polymeric materials is described. The effects of high-temperature processing such as melt mixing and extrusion on the wavelength-dependent light transmission coefficients of various anthraquinone dyes dissolved in a plasticised cellulose acetate melt were investigated by UV-visible spectroscopy and the results are discussed. 7 refs. (Article translated from Plasticheskie Massy, No.10, 2007, p.48-50)
Title: ORIENTATIONAL ELONGATION OF SILANOL-CROSSLINKED POLYETHYLENE FILMS
Page Range: p.T/49-T/52
Author(s): Markov A V; Kuleznev V N; Persits V G
File size: 80K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The orientational elongation of silanol-crosslinked polyethylene films manufactured by reactive extrusion of low density polyethylene with various proportions of a commercial crosslinking agent based on vinyltrimethoxysilane and other modifying additives using a single-screw extruder was investigated by uniaxial elongation in the extrusion direction at a range of elevated temperatures. The effects of the degree of crosslinking, degree of orientation and gel content on the maximum elongation factor, birefringence and thermal shrinkage of the resulting films are discussed in terms of the formation of a continuous crosslinked structure during manufacture. 7 refs. (Article translated from Plasticheskie Massy, No.11, 2007, p.5-7)
Title: MECHANICAL CHARACTERISTICS OF MODIFIED HIGHLY POROUS FIBROUS SYSTEMS
Page Range: p.T/53-T/56
Author(s): Dedov A V
File size: 91K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The fabrication of highly porous fibrous non-woven materials based on a mixture of polyester fibres and various proportions of two-component fibres consisting of a high melting polyester core and a low-melting polypropylene shell by mechanical forming and needle punching with heat treatment by calendaring at different temperatures and different rates is described. The effects of two-component fibre content and processing conditions on changes in porosity of the materials during processing are discussed in terms of elongation and strain resistance. 11 refs. (Article translated from Plasticheskie Massy, No.11, 2007, p.7-10)
Title: MODIFICATION OF THE PROPERTIES OF POLYETHYLENE USING ANTIOXIDANT-ENRICHED FIBROIN
Page Range: p.T/57-T/60
Author(s): Kuliev M M; Ismailova R S
File size: 88K
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Issue Year: ipsat
Volume: 35
Issue No: No.12
Abstract
The dielectric properties and charge state of composites of high density polyethylene (HDPE) with various proportions of natural silk fibroin (NSF) and an antioxidant, prepared by hot pressing, were investigated by dielectric permittivity and dielectric loss tangent measurements as a function of temperature and surface charge density measurements as a function of storage time. The effects of the addition of antioxidant are discussed by comparison with the properties of composites of HDPE with various proportions of NSF. 12 refs. (Article translated from Plasticheskie Massy, No.11, 2007, p.10-13)