Back SearchTitle: EFFECT OF MIXING TECHNOLOGIES ON THE PROPERTIES OF SILICA COMPOUNDS
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Author(s): Ivanov M; Traykov Iv; Pishinkov D
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
Various methods of mixing styrene butadiene rubber (SBR) and isoprene rubber (IR) with silica are investigated. SiO”2 is added to the individual rubbers then the rubbers compounded. Another method involves adding the entire amount of filler to one rubber then adding the second rubber. Mixtures are prepared at 60 and 140 deg.C with one series containing bis(alkoxypolysulphide silane). The vulcanisation, mechanical and dynamic properties are investigated. 8 refs. (Article translated from Gummi Fasern Kunststoffe, No.8, 2007, p.489-493)
Title: COMPARATIVE STUDY OF THE TEMPERATURE DEPENDENCES OF THE STRENGTH OF TUX 100 CROSSLINKING POLYETHYLENE AND DIFFERENT GRADES OF PIPE POLYMERS
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Author(s): Al'pern V D; Gvozdev I V
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
Data on the mechanical properties of a new type of crosslinking polyethylene is presented. Pipes are prepared in a single-screw extruder. Tensile properties with different gel content are compared. Pipe joints are also tested for strength. The high temperature performance of pipes with different gel content and crosslinking is also discussed. 0 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.8-10)
Title: THE PROBLEM OF NUCLEATION OF POLYPROPYLENE (REVIEW)
Page Range: p.T/11-T/17
Author(s): Ivanov A N; Kalugina E V
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
A review of studies devoted to the investigation of the morphology of polypropylene and different classes of nucleating agents and suggested methods of their actions is presented. The use of special procedures makes it possible to produce different crystalline modifications of PP. The introduction of nucleating agents into PP leads to an increase in certain physicomechanical and optical characteristics and also leads to shortening of the processing cycle. It is necessary for the structure of the additive to satisfy an entire set of requirements. The structure of the nucleator mainly determines the properties of the nucleated PP. 41 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.11-15)
Title: STUDY OF THE EFFECT OF AGEING ON THE PROPERTIES OF HETEROGENEOUS SYSTEMS BASED ON FLEXIBLE-CHAIN POLYMERS
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Author(s): Mukha Yu B
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
A study of the effect of ageing on the properties of polymer composite systems is presented. Systems based on polyvinylbutyral are studied. Phenol formaldehyde resin is used as filler and the system cured at 360 K. The ageing of the composite is determined experimentally and theoretically and the least degrading conditions determined. 14 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.15-18)
Title: ELECTRICALLY CONDUCTIVE MATERIALS BASED ON MODIFIED POLYSTYRENE
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Author(s): Bilalov Ya M; Ragimova A A; Ibragimova S M
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
An effective method has been developed for controlling the properties of block polystyrene based on the introduction of small amounts of additive. Composites based on polystyrene modified butyl, chlorinate butyl and carboxylated butyl rubbers are found to have high strength, elongation at break and electrical conductivity. 6 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.18-20)
Title: MODIFICATION OF A COPOLYMER OF VINYL CHLORIDE WITH BUTYLVINYL ETHER
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Author(s): Trofimov B A; Ermakova T G; Volkova L I; Kuznetsova N P; Myachina G F; Chipanina N N; Kanitskaya L V; Vakul'skaya T I; Rokhin A V; Magnonov D M
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
The modification of vinyl chloride-polybutylvinyl ether by exchanging chlorine with sulphonic acid groups to produce materials which have potential as proton conducting membranes is discussed. A series of new copolymers is obtained. The paramagnetism of the insoluble polymer fractions is studied by ESR spectroscopy. The soluble fractions form transparent films and when doped with phosphoric acid exhibit reasonable proton conductivity. 15 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.20-23)
Title: INFRARED SPECTROSCOPY STUDY OF ROLL MATERIAL BASED ON BASALT FABRIC AND POLYETHYLENE FILMS
Page Range: p.T/35-T/38
Author(s): Goncharova T P; Artemenko S E; Kadykova Yu A; Vernigorova V N
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
The development of a new technology using polyethylene film and basalt fabric for roofing and waterproofing materials is reported. The physicochemical interaction of basalt fabric with the polyethylene film is studied by IR spectroscopy. 4 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.23-26)
Title: EFFECT OF FILLER ON THE PROPERTIES OF LOW-FLAMMABILITY HEAT INSULATION MATERIAL
Page Range: p.T/39-T/41
Author(s): Bondareva E A; Sirotinkin N V; Levecheva N F
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
Hollow aluminosilicate and borosilicate glass spheres are investigated as fillers in thermoplastic acrylate, carboxylated latex and butadiene-styrene carboxylated latex as possible heat insulation materials to compete with polyurethane foam. Compression strength, water absorption, thermal conductivity and flammability are investigated. 8 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.26-28)
Title: SYNERGISTIC EFFECT OF MIXTURES OF MINERAL FILLERS IN COMPOSITES BASED ON LOW-DENSITY POLYETHYLENE TREATED WITH A FINISHING AGENT
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Author(s): Dzhafarov V D; Efendiev A A
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
The influence of a mixture of different mineral fillers on the physicomechanical and thermal properties of low density and spent polyethylene materials is reported. The tensile strength and microhardness of the composites can be improved by 40-50% although the elasticity may deteriorate. The influence of particle size and filler on the PE material is studied and the chemical composition is found to have a profound effect on strength and thermal stability. It is established that when a mixture of fillers is used a synergistic effect is observed leading to an improvement in the strength characteristics of the PE material. 9 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.28-30)
Title: INFLUENCE OF WASTE RUBBER ON THE PROPERTIES OF POLYPROPYLENE COMPOSITES
Page Range: p.T/49-T/52
Author(s): Savchenko B M; Grinen'ko V M; Pakharenko A V; Kostritskii V V; Pakharenko V A
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
The influence of the degree of dispersion and content of secondary rubber in the form of ground vulcanised tyres on the properties of a composite material based on polypropylene and selection of the optimum formulation for the composite are discussed. The tensile and impact properties as well as melt viscosity are assessed both with and without compatibiliser. 4 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.31-33)
Title: POLYMERIC ACTIVE MEDIA FOR GENERATING LASER RADIATION
Page Range: p.T/53-T/62
Author(s): Siderov O I
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
The physicochemical properties of epoxy and triazine-containing polymeric active media for generating laser radiation are described. In particular the density, T"g, Young's modulus, thermal conductivity and specific heat are characterised. Issues such as the choice of polymer and laser dye, reduction of photodecomposition of the dye, lowering the level of thermo-optic effects and raising the threshold of occurrence of irreversible optical inhomogeneities in the activated polymers are addressed. 30 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.33-40)
Title: APPLICATION OF ELECTRON PARAMAGNETIC RESONANCE FOR DETERMINING THE GLASS TRANSITION TEMPERATURE OF CROSSLINKED POLYACRYLATES
Page Range: p.T/63-T/64
Author(s): Klimov E S; Davydova O A
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
The glass transition temperature of crosslinked polyacrylate is determined by electron paramagnetic resonance (EPR). The change in structural properties are followed during cooling and heating using 2,2,6,6-tetramethylpiperidone-1-oxyl as a paramagnetic probe. The probe diffuses entirely in the intergrain layers and the dependence of the probe rotation is determined only by the viscosity of the interlayer and not by the volume expansion of the polymer as a whole. 4 refs. (Article translated from G Plasticheskie Massy, No.1, 2007, p.43-44)
Title: USE OF PVC TUBES IN THREE-DIMENSIONAL STRUT CONSTRUCTIONS FOR ROOFING IN BUILDING
Page Range: p.T/65-T/69
Author(s): Malbiev S A
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
The use of plastics, primarily polyvinyl chloride (PVC), for bearing constructions is reviewed. Strut constructions and their load testing are highlighted. 6 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.44-48)
Title: FILM MATERIALS FOR COVERING GREENHOUSES
Page Range: p.T/71-T/75
Author(s): Bugorkova V S; Osipova G S; Varsegov N V; Sirota A G
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Issue Year: ipsat
Volume: 35
Issue No: No.2
Abstract
The use of stabilised and unstabilised, plasticised and non-plasticised low density polyethylene homopolymer and copolymer based materials as suitable films for greenhouse coverings is discussed. The main properties that determine the effectiveness of film use include primarily the physicomechanical, optical and surface characteristics and the durability on exposure to light and heat. The proneness to form cracks in the near surface layer is an important ageing characteristic. The chemical and structural characterisation of these covering materials is reviewed. 24 refs. (Article translated from Plasticheskie Massy, No.1, 2007, p.48-51)