scholarly journals Investigation of chlorinated modifier content influence on the physical-mechanical properties and vulcanizing characteristics of rubber and rubber mixture

2017 ◽  
Vol 286 ◽  
pp. 012004
Author(s):  
K V Sukhareva ◽  
I A Mikhailov ◽  
Yu O Andriasyan ◽  
A A Popov
Keyword(s):  
Mechanical Properties ◽  
Rubber Mixture ◽  
Modifier Content

scholarly journals Influence of magnesium hydrosilicate on the properties plantar rubber

2020 ◽  
Vol 61 (1) ◽  
pp. 91-95
Author(s):  
Konstantin V. Efimov ◽  
◽  
Lyudmila Yu. Tsareva ◽  
Nikolay F. Ushmarin ◽  
Nikolay I. Koltsov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Practical Interest ◽  
Physical And Mechanical Properties ◽  
Rubber Mixture ◽  
Rubber Compounds ◽  
Developed Surface ◽  
The Cost ◽  
Methyl Styrene ◽  
Styrene Butadiene

The properties of rubber products are determined by the nature and content of caoutchoucs, vulcanizing systems and other ingredients. Among them, fillers play an important role. The most common fillers are carbon black and silicas. Recently, in connection with the increasing operational requirements for rubber products, additives of special fillers began to be introduced into rubber mixtures. Among them, silicates are of practical interest, the use of which allows not only to reduce the cost, but also to give qualitatively new useful physical and mechanical properties to rubbers. Improving the physical and mechanical properties of rubbers directly depends on the particle size of the fillers. Fillers with a smaller particle size have a larger surface area and have a significant effect on the physical and mechanical properties of rubbers. The highly developed surface of powdered magnesium hydrosilicate suggests its use as a filler for rubber compounds. In this regard, it is of interest to study the effect of magnesium hydrosilicate on the properties of rubbers. This article explored the possibility of using magnesium hydrosilicate in plantar rubber based on a combination of nitrile butadiene SKN-4055, methyl styrene butadiene SKMS-30ARK and isoprene SKI-3 caoutchoucs. The rheometric properties were investigated for the rubber mixture, and the physical and mechanical properties, hardness, resistance to thermal aging and the action of aggressive media were determined for vulcanizates. As a result of the studies, it was found that the best rheometric, physico-mechanical and operational properties are possessed by the vulcanizate of the rubber compound, in which the silicon-acid filler of rossil 175 was partially replaced by magnesium hydrosilicate. This rubber can be used in the production of oil and petrol resistant soles of rubber shoes.

Mechanical Properties of Modified Epoxy/Rubber Concrete

2016 ◽  
Vol 859 ◽  
pp. 39-44 ◽  
Author(s):  
Xing Wang Shu ◽  
Ying Zhang
Keyword(s):  
Mechanical Properties ◽  
Strain Curve ◽  
Peak Stress ◽  
Rubberized Concrete ◽  
Stress Strain ◽  
Stage Transition ◽  
Modifier Content ◽  
The Relationship ◽  
Rubber Concrete ◽  
Modified Epoxy

To research the effect of a elastic modifier on the mechanical properties of epoxy/rubber concrete, series of epoxy/rubber concretes were prepared with different elastic modifier content, the relationship between elastic modifier content and stress-strain curve of epoxy/rubber concretes were investigated. Results show: as the increase of elastic modifier content, both the compressive and bending stress-strain curves of epoxy/rubber concretes experience a stage transition of elastic-elastoplasticity-plastic apparently; the slope in the rising and falling section of stress-strain curves are gradually decreased; the peak stress decrease while the corresponding strain and stain energy increase. Content of elastic modifier between 40pbw and 60 pbw is proposed in order to attain better properties of epoxy/rubber concrete. Compared with ordinary concrete and rubberized concrete, Improved epoxy/rubber concrete has better comprehensive mechanical properties and larger rubber content.

scholarly journals Influence of technological additive TsD-12 on the properties of heat-aggressive resistant rubber for sealing elements

2020 ◽  
Vol 64 (10) ◽  
pp. 94-97
Author(s):  
Ivan S. Spiridoniv ◽  
◽  
Nikolay F. Ushmarin ◽  
Nadezhda A. Semenova ◽  
Sergey I. Sandalov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oil And Gas ◽  
Physical And Mechanical Properties ◽  
Oil And Gas Industry ◽  
Butadiene Rubber ◽  
Rubber Mixture ◽  
Gas Industry ◽  
Uniform Dispersion ◽  
Zinc Salts ◽  
Sealing Elements

The article presents the results of a study of the effect of the technological active additive СD-12, which is a combination of zinc salts of fatty acids, on the physical and mechanical properties and resistance to aggressive media of rubber for sealing elements of packer-anchor equipment. The rubber mixture was prepared on the basis of hydrogenated nitrile-butadiene rubber Therban 3406, vulcanizing agent Novoperox BP-40, coagents for vulcanization of zinc monomethacrylate and oligoester acrylates MGF-9 and TGM-3, antioxidants Naugard 445 and agidol-2, fillers of technical carbon P 514 and T 900, filler dispersant stearic acid, rosin softener and other ingredients. To stabilize the physical and mechanical properties of vulcanizates, uniform dispersion of rubber components, reduce viscosity and improve vulcanization properties, a technological additive CD-12 was also introduced into the rubber mixture. The rubber mixture was prepared in a laboratory SKI-3L rubber mixer at a temperature not exceeding 70 °C for 7 min. The resulting mixture was vulcanized on a PV-100-2RT-2-PCD vulcanization press at a temperature of 150 °C for 60 minutes and then further vulcanized in a thermostat at a temperature of 160 °C for 6 hours. For the obtained vulcanizates, the physical and mechanical properties and resistance to the action of aggressive media were determined according to the standards existing in the rubber industry. On the basis of a rubber mixture heat-aggressive persistent sealing elements with a hardness of 70±5 Shore A units were made. These sealing elements as part of two sets of packer-anchor equipment were tested for tightness in a casing string simulator. The tests were carried out in an environment of PMS-200 polymethylsiloxane fluid at a temperature of 150 °C, an axial load of 6 tons and a pressure of 70 MPa. It is shown that both sets of packers have passed the tests and meet the requirements. The developed rubber mixture with a hardness of 70±5 Shore A units, containing the process additive СD-12, can be used for the manufacture of sealing elements for packers used in the oil and gas industry.

Applications of the Manometric Method for Measuring the Oxidizability of Rubber. Oxidizability and Aging in the Geer Oven

1940 ◽  
Vol 13 (3) ◽  
pp. 604-610
Author(s):  
Charles Dufraisse ◽  
Jean Le Bras
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Good Reason ◽  
Rubber Mixture ◽  
Industrial Mixture ◽  
Manometric Method

Abstract In summary, the changes which take place in the mechanical properties of a rubber mixture when it is aged in a Geer oven, and which are evident by dynamometric measurements, are closely related to the proportion of oxygen absorbed by the sample. It is therefore much more practical and convenient to measure its oxidizability after only a few minutes' aging, using a sample of any shape whatsoever, and a weight of approximately one gram. As far as any particular standard industrial mixture is concerned, there is no good reason for not conforming to the customary practice of rubber technologists of expressing aging on the basis of loss in tensile strength. In this case the only thing necessary to do is to calibrate the manometer in kg. per sq. cm. after having established the curve relating oxygen absorbed to loss in tensile strength.

scholarly journals The influence of technological additives and peroxides on the properties of rubber mixtures based on ethylene propylene caoutchouc

2019 ◽  
Vol 60 (10) ◽  
pp. 81-87
Author(s):  
Nikolay F. Ushmarin ◽  
◽  
Lyudmila Yu. Tsareva ◽  
Ksenia A. Konnova ◽  
Maria V. Yakimova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Tensile Elongation ◽  
Physical And Mechanical Properties ◽  
Physicomechanical Properties ◽  
Dicumyl Peroxide ◽  
Rubber Mixture ◽  
Elongation At Break ◽  
Ethylene Propylene ◽  
Aging In Air

The article investigates the influence of technological additives and peroxides on the properties of two rubber mixtures based on ethylene-propylene caoutchouc of marking SKEPT-40. The main properties were: rheometric (maximum and minimum torques; start, optimum and maximum vulcanization rates; maximum vulcanization rates), physical and mechanical (conditional tensile strength, elongation at break, hardness) and operational (changes in conditional strength at tensile, elongation at break and hardness after aging in air). The resistance of rubbers to the action of high temperatures by methods of differential thermal and thermogravimetric analysis was studied. As technological additives, MA-L22, Struktol WS180, Zincolet BB 222 and Struktol A89 were used. Vulcanizing agents were peroxides: Novoperox BP-40, Percodox BC-FF, Dicumyl Peroxide (DK), Chemanox PX1 and Dicumyl Peroxide DCP 99. The studies were carried out for two rubbers, one of which is intended for the manufacture of molded products, and the second rubber – for sealing profiles. It was shown that the technological additive Zincolet BB 222 increases the vulcanization rate of rubber mixture for molded products. All technological additives used have practically no effect on the conditional tensile strength and hardness vulcanizates of molded products, increasing their elongation at break. The smallest changes in the physical and mechanical properties are characterized by the vulcanizate, which contains the technological additive Zincolet BB 222. Technological additives practically do not affect the process of vulcanization of the rubber mixture and slightly affect the process of destruction of rubber during aging. Of the investigated technological additives Zincolet BB 222 is more conducive to improving the thermal properties of rubber. It has been established that Novoperox BP-40 and Chemanox PX1 peroxides increase the rate of vulcanization of the rubber mixture for sealing profiles. For vulcanizates of this rubber mixture, when Novoperox BP-40 and Chemanox PX1 is replaced with other peroxides, a decrease in the conditional tensile strength, hardness and an increase in the elongation at break are observed. With aging in air, changes in the physicomechanical properties of the vulcanizates of the rubber mixture variants containing Novoperox BP-40 and Chemanox PX1 are insignificant and close to each other.

The Evolution of Heat during Vulcanization

1937 ◽  
Vol 10 (4) ◽  
pp. 725-734 ◽  
Author(s):  
S. Oberto
Keyword(s):  
Mechanical Properties ◽  
Linear Function ◽  
Rubber Mixture ◽  
Experimental Apparatus ◽  
High Degree ◽  
Quantity Of Heat

Abstract An experimental apparatus has been developed by means of which it is possible to measure with a high degree of precision the heats of vulcanization of rubber mixtures containing even very low percentages of sulfur, at temperatures as low as 110° C. Studies of vulcanization on a strictly thermochemical basis now appear both practicable and promising. An evolution of heat of vulcanization is accompanied by an improvement in the mechanical properties of a rubber mixture. The quantity of heat evolved does not seem to be a linear function of the percentage of combined sulfur, at least for low percentages.

scholarly journals Constructing better roads with asphalt rubber

2015 ◽  
Vol 4 (2) ◽  
pp. 23-52 ◽  
Author(s):  
Jorge C. Pais ◽  
Liseane P. Thives ◽  
Paulo A. A. Pereirâ ◽  
Glicério Trichês
Keyword(s):  
Mechanical Properties ◽  
Laboratory Tests ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Good Resistance ◽  
Rubber Mixture ◽  
Wet Process ◽  
Asphalt Rubber ◽  
Prolonged Fatigue

Abstract Brazilians mixtures containing asphalt rubber were evaluated by mechanical laboratory tests. A conventional mixture with asphalt CAP-50/70 was produced as a mixture control. With the aim of compare the Brazilians mixtures performance, a Portuguese asphalt rubber mixture was tested as well. The testing set involved the determination of the mechanical properties, fatigue and permanent deformation, of asphalt rubber produced by wet process through two different systems: continuous blend and terminal blend. The asphalt rubber morphology was evaluated in order to determine the compatibility of the systems. The asphalt rubber mixtures exhibit good resistance to permanent deformation and prolonged fatigue life in relation to mixture control. Therefore it is concluded that the application of asphalt rubber alters the characteristics of asphalt mixture in a very beneficial way.

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

Sign in / Sign up

Export Citation Format

Share Document