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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
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Friction and Wear Characteristics of Friction Material from Scrap Tire and Potassium Hexatitanate
Park, Jong-Il ; Kang, Dong-Heon ; Kang, Suck-Choon ; Chung, Chan-Kyo ; Chung, Kyung-Ho ; Hong, Young-Keun ;
Elastomers and Composites, volume 36, issue 1, 2001, Pages 3~13
To resolve environmental problem of waste tire and asbestos and also to capitalize the wastes, we developed a new kind of friction material using scrap tire, potassium hexatitanate, filler, and friction modifier in which rubber made a continuous phase. The material containing 5, 20, 10, 20phr of potassium hexatitanate, phenol, friction modifier,
, respectively showed good friction properties, high and stable coefficient or friction, and low wear rate.
Preparation and Properties of Ethylene Vinyl Acetate/Ethylene-1-Butene Copolymer Blend Based Foam
Cha, Gil-Soo ; Kim, Jin-Tae ; Yoon, Jung-Sik ; Kim, Won-Ho ;
Elastomers and Composites, volume 36, issue 1, 2001, Pages 14~21
To increase the properties of EVA foam such as tensile strength, rebound resilience, and compression set, ethylene-1-butene copolymer (EtBC) was blended with EVA. After that crosslink characteristics of the blends and cell structures and mechanical properties of the foam were studied. As the amount of EtBC increased in EVA/EtBC blends, torque values of oscillating disc rheometer(ODR) increased and the foaming ratio decreased because the viscosity and crosslink density of EVA/EtBC blends increased. Foaming ratio and cell size of the foam increased by increasing the amount of foaming agent. When compared the mechanical properties of the foam which have same densities, tensile strength, rebound resilience, and compression set properties of the foam were improved by increasing the amount of EtBC in the EVA/EtBC blends.
Mechanical Properties of Composites of HDPE and Recycled Tire Crumb
Kwak, Sung-Bok ; Choi, Mi-Ae ; Lee, Seong-Jae ;
Elastomers and Composites, volume 36, issue 1, 2001, Pages 22~29
For a purpose of recycling of waste tires, composites of 10-60wt% recycled tire crumb blended with high density polyethylene(HDPE) were prepared, and their mechanical properties such as tensile strength, elongation at break, tensile modulus and impact strength were investigated as a function of tire crumb content. Ethylene-acrylic acid(EAA) copolymer was introduced by 10phr as a compatibilizer and the mechanical properties of the composites were measured. For the blend composition of 40wt% tire crumb content showing improved impact strength, the mechanical properties were measured by varying the EAA content of 5-15phr. All blends, whether modified or unmodified, showed a gradual improvement in impact strength as the tire crumb content increased, but the other properties decreased compared with the pure HDPE. In particular, the addition of EAA copolymer to the tire crumb content over 30wt% showed substantial improvement in impact strength. There was no significant effect of tire crumb size on impact strength of the composites.
Pre-strain Induced Anisotropy of Filled Natural Rubber
Park, Byung-Ho ;
Elastomers and Composites, volume 36, issue 1, 2001, Pages 30~36
The objective of this study was to investigate factor that influences the development of anisotropy in carbon black filled natural rubber vulcanizates. Chain orientation affects tensile strength, stiffness. Parallel sample shows low stress at low deformation, but have high stiffness at high deformation compared to isotropic or perpendicular samples. This study shows that natural rubber(NR) exhibits much larger tensile anisotropy at high strains than SBR. It seems that the parallel sample of NR is dominated by orientation effect at high strains. This oriented chain is expected to act as nuclei for following crystallization during second stretching and facilitates the strain-induced crystallization.
Influence of Filler Composition Ratio on Properties of Both Silica and Carbon Black-Filled Styrene-Butadiene Rubber Compounds
Choi, Sung-Seen ;
Elastomers and Composites, volume 36, issue 1, 2001, Pages 37~43
Influence of the filler composition ratio on cure characteristics and bound rubber content of the compounds and on physical properties of the vulcanizates were studied using both silica and carbon black-filled styrene-butadiene rubber (SBR) compounds with the total filler content of 80.0 phr. The bound rubber content increased slightly with increase of the silica content ratio. The viscosity also increased with increasing the silica content ratio, especially increased steeply after the silica content of 60.0 phr. The cure times obtained with a rheometer, t2, t40, and t90, are increased by increasing the silica content ratio and the cure rate decreased. The delta torque increased with the increased silica content ratio. Variation or the modulus with the silica content ratio showed a decreased trend though the delta torque increased. The tan
decreased with increased of the silica content ratio.
Effects of Chemical Surface Modification of Carbon Black on Vulcanization and Mechanical Properties of Styrene-Butadiene Rubber Compound
Rhee, John-M. ; Kim, Wan-Doo ; Kaang, Shin-Young ; Chang, Young-Wook ; Park, Soo-Jin ; Nah, Chong-Woon ;
Elastomers and Composites, volume 36, issue 1, 2001, Pages 44~51
To see the effect of chemical surface modification, the carbon black surfaces were treated with three types of chemicals (KOH,
, and benzene). Vulcanization and mechanical properties of a styrene-butadiene rubber (SBR) were investigated depending on the chemical treatments. The surface free energy increased considerably with the treatments by both the acid (HCB) and base (KCB), but only a slight increase was observed for benzene treatment(BCB). The BCB showed the highest level of the London dispersive component. The vulcanization reaction was found to be faster in the order of KCB-SBR> BCB-SBR> VCB-SBR(virgin) > HCB-SBR. The difference in minimum and maximum torque of rheocurve, representing the degree of crosslinking, was found to be higher for the BCB-SBR compared to those of VCB-SBR, KCB-SBR, and HCB-SBR. The BCB-SBR and KCB-SBR showed the improved tensile and dynamic mechanical properties. A linear relationship was found to exist between the London dispersive component of surface free energy and mechanical properties.
Foaming Characteristics and Physical Properties of Ethylene Vinyl Acetate Copolymer Foams
Kim, Jin-Tae ; Son, Woo-Jung ; Ahn, Byung-Hyun ; Kim, Won-Ho ;
Elastomers and Composites, volume 36, issue 1, 2001, Pages 52~60
Physical properties of foams depend on the density of foams, Physical properties of base polymers, open ceil contents, and cell structures including the size, size distribution, shape of ceil and the thickness of membrane and strut. The density of foam is affected by raw materials, concentration oi crosslinking agent and blowing agent and process parameters such as processing technique and condition. Ethylene vinyl acetate copolymer(EVA) foam is a crosslinked cellular material. The foaming characteristics and physical properties of EVA foam are affected by decomposition rate of blowing agent. In this study, the decomposition rate of blowing agent and crosslinking rate, foaming characteristics and physical properties of foams were evaluated. The slow decomposition rate of blowing agent results in low density foam, good shock absorption property and uniform cell size distribution compared to the high decomposition rate of blowing agent.