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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 35, Issue 4 - Dec 2000
Volume 35, Issue 3 - Sep 2000
Volume 35, Issue 2 - Jun 2000
Volume 35, Issue 1 - Mar 2000
Selecting the target year
A Study on the High Performance Waterborne Epoxy Resin for Surface Coating
Kim, Yong-Ho ; Lee, Kwang-Won ; Kim, Young-Jae ;
Elastomers and Composites, volume 35, issue 2, 2000, Pages 89~97
Waterborne epoxy resins have been developed in order to meet environmental regulations for reduction of the emission of organic solvents from coating industry As each generation has filled a performance gap in the previous technology, new waterborne epoxy resin has developed. Initially, waterborne epoxy resins were used primarily on masonry, but the subsequent generations have found utility for the protection of metallic substrates as well. Indeed, the third generation systems have been formulated to produce the high performance industrial maintenance primers which possess the desirable combination of good corrosion resistance and low volatile organic compound levels. This paper outlines the important guidelines for formulating waterborne epoxy primers from waterborne epoxy resin that has recently developed in our company. The importance of using the appropriate resin-curing agent system at the optimized epoxy to amine ratio is stressed.
Filler-Elastomer Interactions. 1. Roles of Modified Carbon Black Surfaces to Enhance Mechanical Properties of Carbon Black/Rubber Vulcanizates
Kim, Jeong-Soon ; Nah, Chang-Woon ; Park, Soo-Jin ;
Elastomers and Composites, volume 35, issue 2, 2000, Pages 98~105
Using FT-IR and contact angle measurements it is observed that the chemical surface treatments on virgin carbon blacks lead to a change of the surface properties, including surface functionality and surface free energy It is found that the developments of surface functional groups on acidically and basically treated (ACB and BCB in this study, respectively) carbon blacks are largely correlated with the specific component of surface free energy of the carbon blacks. However, a significant advantage of compounding composites is gained by BCB or NCB (nonpolar chemical treatment) specimens, resulting in improving the hardness, elongation at break, and tensile strength. Particularly, it is seen that the tensile strength of the composites are greatly depended on the London dispersive component of surface free energy determined from the contact angle measurements. It is then concluded that the London dispersion component of carbon blacks plays an important role in an organic rubbers-based compounding composite system.
Foaming Characteristics of Ethylene Vinyl Acetate/Styrene Vinyl Isoprene Styrene Triblock Copolymer Blend
Heo, Jae-Young ; Kim, Jin-Tae ; Yoon, Jung-Sik ; Yoo, Jong-Sun ; Kim, Won-Ho ;
Elastomers and Composites, volume 35, issue 2, 2000, Pages 106~114
The foam of ethylene vinyl acetate (EVA)/styrene-vinyl isoprene-styrene triblock copolymer(SVIS) blend was prepared to improve the shock-absorption and compression set characteristics at room temperature. The effects of blowing agent and blend ratio of EVA/SVIS on expansion ratio, cell structure and mechanical properties of the foam were investigated. As the SVIS content increased, the viscosity of blends was increased but the crosslinking rate was slow down, the expansion ratio was decreased. and the specific gravity was increased. At room temperature, the resilience was not affected by increasing the amount of blowing agent. The value of tan
was increased by increasing the amount of SVIS. As a result, the value of compression set was decreased. This is due to the increased values of specific gravity and crosslinking density of the EVA/SVIS foam.
Study on Rear Door Fixed Glass Weather-strip for Automobiles Using EPDM/Polypropylene Blend (I)
Park, Jong-Yun ; Hwang, Sung-Hyuk ; Kim, Jin-Kuk ;
Elastomers and Composites, volume 35, issue 2, 2000, Pages 115~121
In comparison with thermosetting rubber, thermoplastic elastomer (TPE) has various advantages such as simple processing, short cycle time and recycling of scrap. These advantages can lead to development of the high value-added rubber products due to reduction of the waste material, manufacturing cost and the defected product. This article involves a dynamic vulcanization method for EPDM/polypropylene blend, and the manufacturing of a fixed glass weather-strip by glass insert molding method using the blend. In order to investigate mechanical properties of the product, tensile strength, elongation, hardness and specific gravity were measured. Also morphological study was carried out using SEM. Developments of an efficient system of production and automatic process by molding of TPE and glass simultaneously are expected.
Filler-Elastomer Interactions. 2. Cure Behaviors and Mechanical Interfacial Properties of Carbon Black/Rubber Composites
Kim, Jeong-Soon ; Park, Soo-Jin ;
Elastomers and Composites, volume 35, issue 2, 2000, Pages 122~131
In this work, the effect of chemical surface treatments on morphology of carbon blacks was investigated in terms of cure behavior and tearing energy (
) of carbon blacks/rubber composites. As experimental results, the polar or nonpolar chemical treatment led to a significant physical change of carbon black morphology. The cure activation energies (Ea) and frequency factor (A) obtained from Kissinger equation decreased with improving the dispersion of carbon flacks, resulting in high reactivity. However, a significant advantage of carbon black/rubber composites is gained by carbon blacks treated in basic (BCB) or nonpolar (NCB) chemical solution, resulting in increasing the tearing energy. These results could be explained by changes of dispersion, agglomerate, surface functional group, void volume, and cross-linking density of carbon black/rubber composites.
Effect of Ground Rubber on Mechanical Properties of EPDM Foam
Lim, J.C. ; Lim, H.S. ; Seo, K.H. ;
Elastomers and Composites, volume 35, issue 2, 2000, Pages 132~137
The cure and physical properties of EPDM foam containing ground rubber and carbon black as filler were studied. The cure time reduced with the addition of filler. This result means reducing the operation time. In case of ground rubber was used, blowing ratio, tensile strength, and elongation were decreased rapidly at above 30 phr. On the other hand, in case of carbon black, they showed similar physical properties until 70 phr was used limited to 30 phr to make a good foam, which should be due to low interfacial interaction between EPDM and ground rubber. All the EPDM foams showed excellent thermal stability.
A Study on Impact Sound Insulation Properties of EPDM Micro Cellular Pad
Lee, Kyung-Won ; Lee, Jung-Hee ; Sohn, Ho-Soung ;
Elastomers and Composites, volume 35, issue 2, 2000, Pages 138~148
In order to investigate the possibility of EPDM micro cellular pad (MCP) as an impact sound insulation product, we studied static/dynamic properties and vibration transfer characteristics of EPDM MCP depending on shape, thickness, degrees of foaming by using material test system (MTS) and lab scale mock-up test apparatus. Static/dynamic rigidity is increased when shape is simple. thickness and degrees of foaming low. We could see that dynamic stiffness is proportional to the transmissibility of EPDM MCP. When dynamic stiffness is increased, characteristic peak at transmissibility curve moves high frequency range or snows increase of maximum value of transmissibility. For lab scale mock-up test and finite element method, EPDM MCP shows low vibration velocity and superior mode shape to just concrete plus slab structure. We could confirm that possibility of EPDM MCP as a impact sound insulation product is high.
Effect of trans-octylene rubber(TOR) on the properties of NBR/EPDM rubber blends
Shin, Yung-Sik ; Chang, Young-Wook ;
Elastomers and Composites, volume 35, issue 2, 2000, Pages 149~156
trans-octylene rubber(TOR) was melt-blended with an incompatible NBR/EPDM (70/30) blend. Mixing torque and temperature were reduced as TOR was added to the NBR/EPDM blend. Rheometer results indicated that TOR participated in vulcanization and became a part of network. A scanning electron micrograph demonstrated that EPDM was dispersed in NBR matrix in the blend and the addition of TOR led to a finer dispersion of EPDM particles. On the addition of TOR, the tensile strength, the tensile strain as well as the modulus of the blend vulcanizates increased. The ozone resistance of the blends determined in terms of critical stress-strain parameter was significantly enhanced in the blend as TOR was added. Improvements in the properties were believed to be associated with fine morphology and the increase in crosslink density due to the chain entanglement of the ternary blends.