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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 34, Issue 5 - Dec 1999
Volume 34, Issue 4 - Oct 1999
Volume 34, Issue 3 - Jul 1999
Volume 34, Issue 2 - May 1999
Volume 34, Issue 1 - Mar 1999
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Functionally Graded Polyurethane Elastomers Prepared By Electrophoresis
Zhang, Yuefan ; Shiiba, Tetsuro ; Furukawa, Mutsuhisa ;
Elastomers and Composites, volume 34, issue 5, 1999, Pages 383~390
Functionally graded polyurethane elastomers PUEs/grad. Poly(dimethylammoninum ethylacrylate bromide)(PDMAEA) were prepared by the method of electrophoresis. Results of elemental analysis showed that concentration of PDMAEA had gradient across the thickness(2mm) of the base PUEs. The modified PUEs(PUEs/grad. PDMAEA) containing high concentration of PDMAEA displayed low degree of swelling in benzene which was poor solvent for PDMAEA, and high degree of swelling in water which was good solvent. For the each layer of modified PUEs, glass transition temperature, dynamic storage modulus were stooled by DSC, Rheovibron DDV-IIC dynamic viscoelastomer. The chemomechanical properties of modified PUEs was explored by the electric-stimulus.
Effect of Plasticizers on Mechanical Properties of PVC Compounds
Oh, D.H. ; Kim, D.J. ; Seo, K.H. ;
Elastomers and Composites, volume 34, issue 5, 1999, Pages 391~398
Di-2-ethyl hexyl phthalate (DOP) and di-2-ethyl hexyl adiphate (DOA) were mixed with poly(vlnvl chlorides) [PVC] which have different degrees of polymerization (DP). Tensile strength, elongation, density, abrasion resistance, and hardness of these compounds were measured, High molecular weight PVC(DP 2500) was superior to that of DP 1300 for tensile strength, Hardness. But elongation and abrasion resistance of P1300 systems were better than those of P2500 systems. The densities of both systems were almost same. On the other hand, DOP Plasticized PVC was superior to DOA plasticized one for tensile strength, elongation, hardness. In cases of density, abrasion resistance, and flexual resistance, DOA systems were better than those of DOP systems.
Synthesis and Emulsification of Polyurethane Anionomer
Ann, Choun-Kee ; Jin, Je-Yong ; Lee, Gyung-Won ; Choi, Sei-Young ;
Elastomers and Composites, volume 34, issue 5, 1999, Pages 399~406
Polyurethane (PU) prepolymers were synthesized from polytetramethylene ether glycol (PTMG), 4,4'-diphenylmethane diisocyanate (MDI), toluene 2,4-diisocyanate (TDI) and isophoron diisocyanate (IPDI). After chain extention using dimethyol propionic acid (DMPA), aqueous polyurethane anionomers were prepared from triethyl amine (TEA) as a neutralizer. The effect of the content of chain extender and the degree of neutralization on the state of emulsification, adhesive strength, viscosity, glass transition temperature and physical properties of emulsion cast film were investigated using UTM, Viscometer and DSC.
EPDM Compounds for Electric Insulator
Kim, In-H. ; Hwang, S.H. ; Kim, Jin-K. ;
Elastomers and Composites, volume 34, issue 5, 1999, Pages 407~413
Non-ceramic composite insulator has been interested in the power industry because of its good characteristics in mechanical properties, mass product and design availability. Also it is lighter, and less unexplosive, compared to a ceramic insulator. Especially EPDM rubber composite insulator can be used for long-term in contaminated environments because of its hydrophobicity. This paper showed the rheological properties, the electrical properties, and contact angles to check the hydrophobicity and the recoverability of the EPDM compounds. Also, we investigated surface morphology of the compound by SEM.
A Study on the Properties of Ethylene-Vinyl Acetate Emulsion Blended with SBR, Urethane and Epoxy Latex
Choi, Sang-Goo ;
Elastomers and Composites, volume 34, issue 5, 1999, Pages 414~422
SBR, polyurethane and epoxy latex were separately blended with ethylene-vinyl acetate(EVA) emulsion In
. EVA emulsion was not reacted with latexes in liquid phase and mixtures had good stroage stability. The viscosity of cement mixtures was elevated to 20,000cps in
hours by mixing. The mixtures mixed with pigment represented high viscosity and showed higher viscosity as time goes by. Mixtures had higher hardness with mixing SBR than mixing epoxy or urethane. The hardness was suddenly increased over cement content 30%. showed pencil hardness
. The increase of hardness in high solids was depended upon not only the condensation of latexs but also the coagulation and adhesion of cement particle.