Back SearchTitle: EFFECT OF THE POLYMERISATION TEMPERATURE ON THE MOLECULAR CHARACTERISTICS OF BUTADIENE RUBBER PRODUCED ON A NEODYMIUM-CONTAINING CATALYTIC SYSTEM
Page Range: p.T/1-T/4
Author(s): Akhmetov I G; Kozlov V G; Salakhov I I; Aminova G A; D'Yakonov G S
File size: 89K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
Butadiene was polymerised in the presence of a neodymium versatate-diisobutylaluminium hydride-hexachloro-p-xylene catalyst system and the influence of polymerisation temperature on the polymerisation kinetics and molecular characteristics of the resulting polybutadiene investigated. It was found that the average molec.wts. and polydispersities of the polybutadiene increased with increasing polymerisation temperature and that polymerisation probably involved at least two types of active centres. 12 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.2-4)
Title: THERMAL DEGRADATION OF BUTADIENE AND ISOPRENE RUBBERS IN ORGANIC SOLVENTS
Page Range: p.T/5-T/10
Author(s): Andreikov E I; Amosova I S
File size: 101K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
An investigation was carried out into the thermal degradation of butadiene rubber and polyisoprene rubber in organic solvents (toluene and heavy petroleum residue). Thermal solvolysis was carried out in a rotating autoclave reactor under solvent vapour pressure at temperatures from 200 to 380 degrees C and the decomposition products analysed by FTIR spectroscopy and PMR spectroscopy. A sequence of chemical transformations was established and a comparison made of the thermal degradation process in solvents with the pyrolysis of rubbers in the absence of solvents. 35 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.4-9)
Title: ACTIVATING EFFECT OF SHUNGITE IN THE VULCANISATION OF BUTADIENE-ACRYLONITRILE ELASTOMERS
Page Range: p.T/11-T/13
Author(s): Shershnev A A; Zhivina E A; Morozov Yu L; Reznichenko S V
File size: 59K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
An investigation was carried out into the activating effect of shungite in nitrile rubbers (BNKS-18, BNKS-28 and BNKS-40). The kinetics of vulcanisation, degree of swelling in toluene and physicomechanical properties of nitrile rubber vulcanisates containing zinc oxide and vulcanisates in which zinc oxide was replaced with 5, 10 and 15 parts of shungite were determined and compared. It was found that shungite did have an activating action in the sulphur vulcanisation of nitrile rubber but was less active in the presence of carbon black. However, highly elastic vulcanisates could still be obtained and shungite could be used as a partial replacement for zinc oxide. 3 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.12-14)
Title: THE RELATIONSHIP BETWEEN THE REINFORCEMENT OF ELASTOMERS WITH CARBON BLACK AND THEIR VULCANISATION
Page Range: p.T/15-T/16
Author(s): Nikitin Yu N; Khodakova S Ya
File size: 31K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
A discussion is presented on the relationship between the reinforcement of elastomers with carbon black and their vulcanisation. 17 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.14-15)
Title: 2-SULPHOBENZOIC ACID IMIDE AS A RUBBER MIXING INGREDIENT
Page Range: p.T/17-T/18
Author(s): Shilov I B; Khlebov G A; Vesnin R L
File size: 53K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
2-Sulphobenzoic acid imide was evaluated as a stabiliser and scorch retarder in butadiene-methylstyrene rubber (SKMS-30ARK) and rubber mixes based on NR and SKMS-30ARKM-15 by means of DTA, scorch measurements, accelerated heat ageing tests and physicomechanical testing. The results obtained were compared with those for rubbers containing N-nitrosodiphenylamine and ionol. 6 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.15-16)
Title: EFFECT OF SORPTION-INACTIVE FILLERS ON THE OIL AND PETROL RESISTANCE OF SILOXANE RUBBERS
Page Range: p.T/19-T/22
Author(s): Mikhailova G A; Baburina V A; Kalmykova V Ya; Deberdeev R Ya; Kutyrev G A
File size: 83K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
The effects of various fillers (whiting, titanium dioxide, kaolin, talc, wollastonite and quartzite) on the resistance of silicone rubber vulcanisates to various oils, diesel, petrol and an isooctane-toluene mixture, were investigated. Changes in the weight and hardness of the rubbers in the different corrosive media were followed and the most effective filler for producing oil and petrol resistant vulcanisates sought. 4 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.16-20)
Title: THE EFFECT OF PROCESS ADDITIVES ON THE VISCOSITY OF COMPOSITES BASED ON BUTYL RUBBER
Page Range: p.T/23-T25
Author(s): Galimzyanova R Yu; Makarova D N; Makarov T V; Khakimullin Yu N; Vol'fson S I
File size: 75K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
The effects of various additives on the rheological properties (viscosity) of butyl rubber composites were investigated using an MRT capillary viscometer in the temperature range 80 to 120 degrees C at shear rates ranging from 1 to 700 s/1. Additives employed were Rubrax, low-density polyethylene (LDPE 15803-020), a copolymer of ethylene with vinyl acetate (CEVA 11507-375) and p-tert-butylphenol-formaldehyde resin 101K (AFFS). 4 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.20-22)
Title: IDENTIFICATION OF THE REACTION PRODUCTS OF ZINC OXIDE WITH EPSILON-CAPROLACTAM AND STEARIC ACID IN A EUTECTIC MELT
Page Range: p.T/27-T/29
Author(s): Puchkov A F; Talbi E V; Turenko S V
File size: 77K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
An investigation was carried out to identify the reaction products of zinc oxide with epsilon-caprolactam and stearic acid in a eutectic melt using IR spectroscopy. The components are used to produce Dispractol I, which serves as a dispersant and activator in rubber vulcanisation. It was established that a binary epsilon-caprolactam-stearic acid eutectic melt in a ternary epsilon-cparolactam-stearic acid-zinc oxide meelt was a stearic acid donor for zinc stearate formation. Depleted of binary eutectic, the melt was enriched with epsilon-caprolactam, which was capable of forming p- and pi-complexes with zinc. 6 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.22-25)
Title: USING OLIGOMERS PRODUCED BY THE INTERACTION OF EPSILON CAPROLACTAM WITH ALCOHOLS AND AMINES AS MODIFIERS OF ELASTOMER COMPOSITES BASED ON UNSATURATED RUBBERS
Page Range: p.T/31-T/34
Author(s): Khitrin S V; Tokarev A A; Shekhireva E G
File size: 70K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
Oligomers were prepared by the interaction of epsilon-caprolactam with alcohols and amines (decanol, glycerin, PVAl, diethanolamine and hexamethylene diamine) and evaluated as modifiers in standard elastomer composites and industrial tyre carcass mixes based on SKI-3 polyisoprene. The physicomechanical properties of the novel rubber mixes and vulcanisates were investigated and compared with those of mixes and vulcanisates containing a modifier based on resorcinol and urotropin. The oligomers were found to be particularly effective at increasing rubber-to-cord bond strength. 4 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.25-28)
Title: EFFECT OF THE NATURE OF OLIGOMERS WITH END SH GROUPS ON THE PROPERTIES OF SEALANTS BASED ON THEM
Page Range: p.T/35-T/37
Author(s): Kurkin A I; Kulikov A V; Valeev R R; Samuilov Ya D
File size: 69K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
A comparison is made of the physicomechanical properties of sealants containing various oligomers with SH end-groups. The oligomers under investigation are Thiokol NVB-2, TPM-2 polymer and a polyester urethane thiol. The data demonstrate the fundamental effects of the nature of the oligomers on the properties of the sealants. 5 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.28-30)
Title: ASSESSMENT OF THE WEAR RESISTANCE OF TYRE TREADS ON THE BASIS OF BENCH TESTS USING A BINOMIAL SERIES
Page Range: p.T/39-T40
Author(s): Klepik N K; Tarnovskii V N; Klement'ev D S
File size: 77K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
An equation is proposed for describing the dependence of the intensity of tyre tread wear on the forces acting at the point of contact. Data are included showing the effects of torque and tangential and lateral forces on the intensity of tread wear of model MI-166 tyres. 5 refs. (Article translated from Kauchuk I Rezina, No.2, 2008, p.30-31)
Title: DEVELOPMENT OF PRECISION POLYMERS AND ADVANCED FUNCTIONAL POLYMERS STARTING FROM SUBSTITUTED ACETYLENES
Page Range: p.T/41-T/48
Author(s): Shiotsuki M; Sanda F; Masuda T
File size: 187K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
A review is presented on precision polymers and advanced functional polymers starting from substituted acetylenes. It covers the living polymerisation of phenylacetylene by an isolatable initiating species (a rhodium complex with a tetrafluorobenzobarrelene ligand), synthesis of phenylacetylene graft polymers with PS and PMMA side chains, substituted polyacetylene forming a helix stabilised by steric repulsion between side chains and polynorbornene and substituted polyacetylene organic radical cell materials. 51 refs.(Article translated from Nippon Gomu Kyokaishi, No.11, 2008, p.473)
Title: PHYSICOCHEMICAL FEATURES OF POLYMER COMPOSITE PRODUCTION BY POLYCONDENSATION FILLING
Page Range: p.T/49-T/52
Author(s): Kardash M M; Artemenko S E
File size: 82K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
A novel polycondensation filling method for the production of composites from thermosetting polymers and fibres is presented. The method involves the production of a phenol-formaldehyde oligomer in the structure and on the surface of a filler directly during the formation of the composites and eliminates the need for energy- and labour-intensive stages, such as vacuum drying and dissolution of solvents. Data are included on properties of composites, including magnetic composites, produced using the new method. (Article translated from Plasticheskie Massy, No.1, 2008, p.6-8)
Title: A STUDY OF THE POLYMERISATION TEMPERATURE OF HYDROGEL AND THE PROPERTIES OF THE COPOLYMERS SYNTHESISED
Page Range: p.T/53-T/56
Author(s): Egina Yu S; Burmistrov I N; Kolesnichenko N A; Panova L G
File size: 101K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
The preparation of hydrogels based on acrylic acid and a comonomer which also acts as a structure-forming component is described. The effect of polymerisation temperature on hydrogel preparation and the influence of the nature, quantity and ratio of hydrogel components on UV-initated polymerisation are examined and the impact of magnesium hydroxide addition on the flammability of the hydrogels assessed. 2 Refs. (Article translated from Plasticheskie Massy, No.1, 2008, p.9-11)
Title: PHYSICAL MODIFICATION OF EPOXY COMPOUNDS TO IMPROVE THEIR SERVICE PROPERTIES
Page Range: p.T/57-T/59
Author(s): Pinkas M V; Plakunova E V; Panova L G
File size: 65K
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Issue Year: ipsat
Volume: 36
Issue No: No.4
Abstract
Epoxy resin compositions were prepared using trichloroethyl phosphate as flame retardant, talc as filler and polyethylene polyamine as curing agent and their physicomechanical properties and thermal degradation behaviour investigated. The effect of UV radiation on the properties of the epoxy compositions was also investigated. 5 refs. (Article translated from Plasticheskie Massy, No.1, 2008, p.11-13)