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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Elastomers and Composites
Journal Basic Information
Journal DOI :
The Rubber Society of Korea
Editor in Chief :
Volume & Issues
Volume 36, Issue 4 - Dec 2001
Volume 36, Issue 3 - Sep 2001
Volume 36, Issue 2 - Jun 2001
Volume 36, Issue 1 - Mar 2001
Selecting the target year
Recycling of Waste Rubber by De-link System (I)
Hwang, Sung-Hyuk ; Hong, John-Hee ; Yoo, Tae-Uook ; Kim, Jin-Kuk ;
Elastomers and Composites, volume 36, issue 2, 2001, Pages 79~85
It goes to be serious with environmental pollution cause waste rubber. That is why there are lot of studies for efficient recycle. The purpose of this study is to improve the physical properties of EPDM powder by using De-link system. We changed on the size of waste rubber powder and De-link contents. we examined the physical, rheological, mechanical properties. And also examined cross-link state at various De-link. Also we carried out morphological studies after making the weather strip's feature by optical microscope.
A Study on Thermoplastic Elastomer Blend Using Waste Rubber Powder(I): Screw Configurations, Morphologies and Mechanical Properties
Lee, Sung-Hyo ; Hwang, Sung-Hyuk ; Kim, Jin-Kuk ;
Elastomers and Composites, volume 36, issue 2, 2001, Pages 86~93
For solving the environmental problem of the waste EPDM and for new TPE blend materials, we developed a new kind of TPE material using a co-rotating twin screw extruder. To improve the mechanical properties of TPE material such as tensile strength, elongation at break, and modulus of the blend, PP and waste EPDM powder were blended with different screw configurations. The mechanical properties of the blends and morphology of the TPE were investigated. As the number of kneading disc and left-handed screw element increased, dynamic vulcanization of the material was increased because the shear stress and residence time of blends increased.
Filler-Elastomer Interactions : 4. Effect of Plasma Treatment on Surface Properties of Carbon Blacks
Kim, Jeong-Soon ; Choi, Kyung-Eun ; Park, Soo-Jin ;
Elastomers and Composites, volume 36, issue 2, 2001, Pages 94~101
In this work, the effect of NE plasma treatment generated by radio-frequency was investigated in acid-base surface values, ion adsorption characteristics, and surface free energies of carbon blacks. As the results, it was clearly found that the obvious improvement of the treatment is in the London dispersive component (
) of surface free energy of carbon blacks. Also both electron-acceptor (
) and -donor (
) parameters for the specific component (
) were also increased with increasing the treatment time, resulting in increasing the surface functional groups of the carbon blacks studied, together with a consequence of the increases of acidic and basic surface functional groups, ion exchange, zeta potential, and ion mobility.
Effect of Surfactant and Anti-foaming Agent on the Properties of Silicone Rubber Impression Material
Kim, Kyoung-Nam ; Cho, Lee-Ra ; Oh, Young-Il ; Kang, Seung-Kyung ; Chung, Kyung-Ho ;
Elastomers and Composites, volume 36, issue 2, 2001, Pages 102~110
The three types of surfactants such as nonylphenoxy poly(ethylene) ethanol homologues, caster oil poly(ethylene) ethanol homologues, and sodium perfluoroalkyl carboxylates are used to improve the wettability of rubber impression material. Among the surfactants, the usage of sodium perfluoroalkyl carboxylates containing fluoro group resulted in the lowest surface energy of impression material and the result gave the positive effect on the wettability of rubber impression material to teeth. Also, the anti-foaming agents were used to reduce or remove the hydrogen gas generating on the impression material by reaction. In the case of rubber impression material containing sodium perfluoroalkyl carboxylate as a surfactant, it was found that the tear strength of rubber impression material increased over 3 N/mm with the addition of anti-forming agent. Therefore, the anti-foaming agent could contribute to the mechanical property of rubber impression material without the change of surface property.
Mechanical Properties of Natural Rubber/Acrylonitrile-Butadiene Rubber Blends and Their Adhesion Behavior with Steel Cords
Sohn, Bong-Young ; Nah, Chong-Woon ;
Elastomers and Composites, volume 36, issue 2, 2001, Pages 111~120
Mechanical properties and their adhesion behavior with zinc- and brass-plated steel cords of natural rubber/acrylonitrile-butadiene blend compounds were investigated as a function of blend ratio. The Mooney viscosity and stress relaxation time were found to be lowered with increasing NBR content. Tensile modulus generally increased with increasing NBR content. Tensile stress at break stayed constant up to about 40 phr and showed minimum at
, and thereafter increased with increasing NBR content. Strain at break decreased linearly below 50 phr, and above the level it showed nearly constant value. Based on the abrupt drops in elastic modulus and tan
peak, the glass transition temperature of NR and NBR were found to be -55 and
, respectively. In the case of NR/NBR blend compounds, two distinct transition points were observed and each transition position was not affected by NBR level indicating an incompatible nature of NR/NBR blend system. The pullout force and rubber coverage decreased to the level of about 40% to that of pure m compound, when the 50 phr of NR was replaced by NBR. However, the pure NBR compound showed the comparable adhesion performance with NR(
). The sulfur concentration was found to become lower with the increased NBR content at the adhesion interface based on the Auger spectrometer results, representing a lack of adhesion layer formation, and this was explained for a possible cause of low adhesion performance with adding NBR.
A Study on the Friction Characteristics of Vulcanized Natural Rubber Plate
Kim, D.J. ; Nah, C. ; Lee, Y.S. ; Kim, W.D. ;
Elastomers and Composites, volume 36, issue 2, 2001, Pages 121~129
The friction characteristics of natural rubber plates under various conditions including sliding speed, normal force, hardness, lubrication conditions and thickness of plate are analyzed experimentally. The frictional force and normal force are measured by a tester pin and a load ceil with strain gages. Experimental results suggest that the coefficient of friction decreases with increasing the hardness of rubber and decreasing the thickness of plate. The effect of sliding speed is not significant over the speed range employed. The coefficient of friction is found to be about 0.1 under oil lubrication condition and varies from 0.9 to 3.9 under no lubrication condition.