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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 33, Issue 5 - Dec 1998
Volume 33, Issue 4 - Oct 1998
Volume 33, Issue 3 - Jul 1998
Volume 33, Issue 2 - May 1998
Volume 33, Issue 1 - Mar 1998
Selecting the target year
A Study on the Properties of Polyvinyl Acetate Emulsion Mixed with SBR, Polyurethane and Epoxy Latex
Suh, Won-Dong ;
Elastomers and Composites, volume 33, issue 3, 1998, Pages 149~158
SBR latex, polyurethane latex and epoxy latex were separately mixed with polyvinyl acetate emulsion. The various physical properties were examined for the mixtures. Epoxy mixtures gave a transparent film. Both polyurethane and SBR mixtures showed opaque film with high viscosity. In SBR and polyurethane increase in hardness was dependent on the evaporation rate of water, but in epoxy it was dependent on the degrees of crosslink. Epoxy's showed excellent water-resistance. SBR showed a good flexural strength and impact strength. When vinyl acetate emulsion was mixed with less than 10% latex paper tube showed the ductile fracture, but over latex content 20%, it showed the brittle fracture.
Aging Behavior of Natural Rubber and EPDM
Kim, Jin K. ; Kim, In-Hwon ; Shin, Jin-Soo ;
Elastomers and Composites, volume 33, issue 3, 1998, Pages 159~167
Rubber products are aged like human complexion by the attack of oxygen, ultra violet, ozone, etc.. Aging is very important and also very complicated phenomenon to understand. This may explain the rarity of papers on this subject. In this study, we tried to understand the aging behavior of EPDM compared to that of natural rubber. We also compared the sulfur vulcanized system to the peroxide vulcanized one. In our experiment, the peroxide vulcanizates were more advantageous in aging than the sulfur vulcanizates. The authors belived that this study about the high performance EPDM would be applicable to rubber industry.
Finite Element Analysis and Fatigue Life Evaluation of Automotive Rubber Insulator
Kim, W.D. ; Woo, C.S. ; Han, S.W. ;
Elastomers and Composites, volume 33, issue 3, 1998, Pages 168~176
A strut rubber insulator is used in a suspension component of passenger cars. The uni-axial tension, compression, and the shear test were performed to acquire the constants of the strain energy functions which were Mooney-Rivlin model and Ogden model. The finite element analysis was executed to evaluate the behavior of deformation and stress distribution by using the commercial finite element code MARC ver K6.2. Also, the fatigue tests were carried out to obtain the fatigue life-load curve. The fatigue failure was initiated at the folded position of rubber, which was the same result predicted by the finite element analysis.
Study on the Synthesis of Polyurethane Cationomers and Their Mechanical Properties
Ann, Choun-Kee ; Jin, Je-Yong ; Choi, Sei-Yong ;
Elastomers and Composites, volume 33, issue 3, 1998, Pages 177~184
Polyurethane(PU) prepolymers were synthesized from polytetramethylene ether glycol(PTMG), with 4,4'-diphenylmethane diisocyanate(MDI), toluene 2,4-diisocyanate (TDI) and isophoron diisocyanate(IPDI). After chain extention using n-methyl-diethanol amine(n-MDEA), aqueous polyurethane cationomers were prepared by addition of glycolic acid(GA) as a quaternizer. The effect of the content of chain extender and the degree of neutralization on the stability of emulsion, adhesive strength, viscosity, glass transition temperature and physical properties of emulsion cast film were investigated using UTM, viscometer and DSC.
Effects of Silane Coupled Silica on the Pysical Properties of Synthetic Rubber Compounds
Lee, Seag ;
Elastomers and Composites, volume 33, issue 3, 1998, Pages 185~192
This study was investigated on the physical properties of synthetic rubber compounds containing silica and silane copuled silica. Surface area and pore volume of silane copuled silica appeared to be low compared with those of pure silica because silane coupling agent blocks the pore of silica surface during silanization reaction. Silica with large surface area and high structure showed the short scorch time
and rapid cure rate. The silane coupled silica showed the shorter scorch time and more rapid cure rate than pure silica because of the of effect of sulfur in the silane coupling agent(Si 69), The high value of
minus CTAB com-pared with surface area and structure of silica showed the high 300% modulus. Also, the surface area and structure of silica did not affected the amount of PICO loss that indicate the abrasion resistance but affected the amount of cut and chip loss.
Gas Impermeability Enhancement of EFDM/Crosslinked IIR Blends
Kim, Hyun-Jun ; Jung, Il-Hyun ; Hong, In-Kwon ; Park, Jae-Woo ;
Elastomers and Composites, volume 33, issue 3, 1998, Pages 193~200
It is well known that EPDM(ethylene propylene diene monomer) rubber has inherently excellent resistance to the weathering, ozone, heat, cold and moisture, whereas crosslinked IIR (isobutylene isoprene divlnyl benzene terpolymer) shows proper resistance to the water and gas permeation. Various characteristics of EPDM blend with crosslinked IIR such as curing characteristics, mechanical properties, dispersion of minor component and gas impermeability were explored. The optimum curing time
examined with peroxide was decreased by adding small amount of crosslinked IIR to the EPDM rubber. Mechanical properties of blends such as tensile strength, hardness and elongation at break were enhanced by increasing EPDM content. These results might be explained with the affinity of carbon black to the EPDM rubber. On the other hand, the physical properties were not changed significantly after aging, and the increase of crosslinked IIR fraction caused the decrease of compression set to small rate. EPDM rubber shows different behavior with crosslinked IIR in oxygen permeability. By adding 30wt.% crosslinked IIR to the EPDM rubber, the resistance to the oxygen permeation was improved up to three times than that of pure EPDM rubber. Conclusively, EPDM blend containing 30wt.% crosslinked IIR might be commercially applied to the o-ring and electric parts because of its proper resistance to the weathering, ozone and oxygen permeability.
Study on the Preparation of Alumina Powders used os a Rubber Filler with a Microwave Extraction System
Park, Chan-Young ; Hwang, Eun-Hee ; Han, Seong-Kee ;
Elastomers and Composites, volume 33, issue 3, 1998, Pages 201~209
Alumina powders used as a filler in rubber compounding was extracted from kaolin in
solution employing conventional thermal and microwave energy resources. Maximum degrees of alumina extraction from kaolin were 72.8% at
, and 180min in the conventional thermal extraction process and were 99.0% at
,, and 60min in the microwave extraction one, respectively. The samples synthesized in both processes were analyzed by means of TG/DTA, XRD, SEM, Atomic Emission Spectroscopy, and BET method. Studies are presently under way to unravel the basic interaction mechanisms between microwave and alumina power for high rates of alumina extraction from kaolin in the microwave ex-traction process.