Back SearchTitle: MACHINES AND PLANT FOR TUBE AND PROFILE PRODUCTION
Page Range: p.T/1-5
Author(s): Pohl T; Podzelny F
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
The extrusion of rubber tubes and profiles is considered and the decision-making process for building an extrusion line is examined. Straining, shaping, transporting the product, vulcanisation, cooling, stacking and winding, and open- and closed-loop control are discussed. Some examples of recent improvements in machinery, e.g. separate drives for extruder feed rolls, more efficient vulcanising and cooling sections, low-impact transport elements and automated winders are presented. It is shown that, as the demand for higher-quality products and lower production costs never ceases, technical tools such as simulation programs or models for controlling the start-up process will become even more important in the future. (Article translated from Gummi Fasern Kunststoffe, No.10, 2007, p.659-663))
Title: FUNDAMENTAL STUDIES & RECENT ADVANCES IN ANIONIC POLYMERIZATION. VI. CREATION OF FUNCTIONAL NANOMATERIALS VIA SELF ORGANIZATION OF BLOCK CO-POLYMERS
Page Range: p.T/7-14
Author(s): Sugiyama K; Hirao A
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
In part VI of this review, the creation of nanomaterials by microphase separation and selective domain stripping is discussed, with reference to isolation of domains by degradative reactions and to nanoarchitecture using ionic interactions. The assembly of nanostructures by micelle formation is then considered, including micelle formation with block copolymers in selective solvents, and creation of nanostructures by micellisation. 48 refs. (Article translated from Nippon Gomu Kyokaishi, No.9, 2007, p.360)
Title: DEVELOPMENT OF A TYRE MODIFIED WITH NATURAL RUBBER: AIMING FOR A PETROLEUM FREE TYRE
Page Range: p.T/15-22
Author(s): Wada T; Uchida M; Ichikawa N; Sakaki T; Hattori T
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
The response of society and that of the tyre industry to environmental issues is considered. The history of the materials used in tyre manufacture is outlined. The possibility of using inorganic fillers, vegetable oils and modifications of natural rubber, e.g. epoxidised NR, as non-petroleum materials in tyre manufacture is discussed and the improvements which can be achieved in rolling resistance and braking performance on wet road surfaces are described. 5 refs. (Article translated from Nippon Gomu Kyokaishi, No.2, 2008, p.51-57)
Title: pi-CONJUGATED CONDUCTIVE POLYMERS
Page Range: p.T/23-29
Author(s): Otsuka S; Tanaka G; Yamamoto T
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
The literature on the synthesis of pi-conjugated polymers such as polythiophene, polypyrrole and polyphenylene is reviewed, with particular reference to organometallic polycondensation, e.g. with Grignard reagents, zero-valent nickel complexes and palladium complexes. Oxidative polymerisation and electrochemical polymerisation are also mentioned. Applications of these polymers in organic electroluminescent devices and organic field effect transistors are also considered. 50 refs. (Article translated from Nippon Gomu Kyokaishi, No.3, 2008, p.80-85)
Title: MECHANISM OF INITIATION OF THE CURING OF ANAEROBIC ADHESIVES
Page Range: p.T/31-38
Author(s): Sineokov A P; Aronovich D A; Murokh A F; Khamidulova Z S
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
A review is presented of the literature on studies of the mechanism of initiation of the curing of anaerobic composites, which are based on polyfunctional acrylic monomers and balanced initiating and stabilising systems, by a system consisting of cumyl hydroperoxide, dimethyl-p-toluidine and o-sulphobenzoic acid imide. The observed rapid curing of adhesives in the narrow gap between copper and steel surfaces is due to conversion of the metal to the lowest degree of oxidation, catalytic decomposition of the hydroperoxide, consumption of the oxygen in the composite, and subsequent uninhibited radical polymerisation of the acrylates. These events are shown to be possible because of the emergence in the anaerobic composite of charge-transfer complexes between the electron donor and acceptors which, with the participation of oxygen, are capable of generating ion-radical pairs. Reactions of the transformation of the accelerator cation radical and the oxygen anion radical cause the curing of the anaerobic composite on any metal surface. 45 refs. (Article translated from Plast.Massy, No.6, 2007, p.26-31)
Title: MODELLING OF PROCESSES OF FILLED EPOXY COMPOSITE MATERIALS
Page Range: p.T/39-41
Author(s): Zharin D E; Kalimullin A S; Shafigullin L N
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
The development of an effective system for calculating regimes for the machining of filled epoxy composite materials is discussed. Results of experimental and theoretical studies of drilling of composites containing epoxy resin, polyethylene polyamine curing agent, dibutyl phthalate plasticiser and diabase filler are presented. The effects of the feed, the drill rotational speed and the depth of machining on the roughness of the machined surfaces were examined. Based on the models obtained for the machining process, an automated system for calculating the machining regimes was developed. 10 refs. (Article translated from Plast.Massy, No.6, 2007, p.35-37)
Title: MODELLING OF THE AIR FILTRATION RATE USING NEEDLE-PUNCHED AND MODIFIED MATERIALS
Page Range: p.T/43-48
Author(s): Dedov A V
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
An investigation was carried out of the possibility of using the filtration factor to assess the air filtration rate in needle-punched and modified materials and to determine its dependence on the structure and manufacturing technology of the materials. Specimens of needle-punched materials manufactured from polyester fibre and specimens based on a mixture of polyester and bicomponent fibres were used. It was shown that, when calculating the air filtration rate, it was necessary to take into account air limiting pressure values. The proposed equation for predicting the air filtration rate contained two variables but the values of these variables were not dependent on the volume density or surface density of the materials, which was characteristic of equations relating the air permeability of the materials to one of their structural characteristics. 20 refs. (Article translated from Plast.Massy, No.6, 2007, p.37-41)
Title: STRESS RELAXATION DURING NON-LINEAR STRAIN IN POLYMERIC MATERIALS
Page Range: p.T/49-50
Author(s): Norkulov A A
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
Equations for modelling the stress relaxation during non-linear strain in polymeric materials are presented. The obtained theoretical dependence makes it possible to conduct a computer-aided experiment on the model, i.e. to change the mechanical properties of polymeric materials with the aim of improving the process of stress relaxation flow in a reasonable direction and time. 4 refs. (Article translated from Plast.Massy, No.6, 2007, p.42)
Title: RAPID METHOD FOR ASSESSING THE RESISTANCE OF THERMOPLASTICS TO THERMO-OXIDATIVE DEGRADATION
Page Range: p.T/51-52
Author(s): Bugorkova V S; Varsegov N V; Sirota A G
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
The assessment of the resistance of thermoplastics to thermooxidative degradation by use of an instrument for determining the melt flow index(MFI) is described. Results of tests on HDPE, either heat-stabilised or containing 5 wt % of a polar additive that does not co-crystallise with the PE, or both, are presented and discussed. It is demonstrated that the instrument for determining MFI can be used effectively for assessing the changes taking place in amorphous-crystalline thermoplastics as a result of thermooxidative degradation. It can be used for selection of stabiliser and additives for such thermoplastics. 2 refs. (Article translated from Plast.Massy, No.6, 2007, p.43-44)
Title: OLIGOETHOXYSILANES WITH 3,5-DICHLOROPYRIDYLOXYSILYL UNITS FOR THE PROTECTION OF TEXTILES AGAINST BIODETERIORATION
Page Range: p.T/53-56
Author(s): Skripnikova V S; Izmailov B A; Astapov B A
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Issue Year: ipsat
Volume: 35
Issue No: No.7
Abstract
A method was developed for the synthesis of biologically-active 3,5-dichloropyridyl-containing oligoethoxysiloxanes by the reaction of tetradecaethoxyhexasiloxane with 3,5-dichloro-2-oxy-, 3,5-dichloro-2-methyleneoxy- and 3,5-dichloro-2-ethyleneoxypyridine. The physicochemical properties of the products were studied and it was established that the compounds possessed bioprotective properties. The possibility of using them to protect textiles, e.g. wool, nylon, cotton, against biodeterioration was demonstrated. 5 refs. (Article translated from Plast.Massy, No.6, 2007, p.53-56)