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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
Selecting the target year
Properties of Epoxy Modified PVC-sol Sealants
Lee, Seung-Jin ; Kim, Hyun-Kyo ; Park, Hwan-Man ; Cho, Won-Jei ; Ha, Chang-Sik ;
Elastomers and Composites, volume 34, issue 3, 1999, Pages 199~211
In this work, the effects of the addition of epoxy on the properties of PVC-sol sealants were investigated. PVC-sol was plasticized with dioctyl phthalates(DOP). Two kinds of epoxy resins having different epoxy equivalent weight (E.E.W.) were used. It was found that the properties of the PVC-sol sealants were significantly affected by the contents and types of the added epoxy resins. The viscosity behaviors of the epoxy-modified sealants, in the case of epoxy A addition, the viscosity was decreased with increasing the epoxy contents, but In the case of
addition, the viscosity was increased with increasing the
contents. The viscosity of epoxy modified sealants aged at
waterbath was decreased with increasing epoxy contents, since the epoxy acted on the sealants as a stabilizer. The thermal stability of the PVC-sol sealants was slightly improved by adding epoxy. The tensile strength and elongation of sealants modified with epoxy A(two functionalities of epoxy) were increased with increasing the epoxy contents up to a certain epoxy contents but was decreased with further increasing the epoxy contents. In the case of
addition, the tensile strength of sealants were decreased with increasing the
contents. In view of the electrical properties, such as tan
), it was found that the epoxy modified sealants were as good as insulators.
Mechanical Properties of Polypropylene/Recycled Rubber Blends
Axtell, F.H. ; Maiseaumsook, T. ; Phinyocheep, P. ;
Elastomers and Composites, volume 34, issue 3, 1999, Pages 212~221
Mechanical properties of polypropylene filled with recycled rubber dusts obtained from the buffing process in sport shoe sole manufacture were investigated. The use of these dusts eliminates the need for the size reduction process which is usually employed in rubber recycling. Two different waxes, polypropylene wax and ethylene vinyl acetate wax, were used in the PP/rubber dust compound. Two different processes, extrusion and injection moulding, were used to study the influence of the blends on the properties. The waxes gave significant improvement in the shaping of the extrudate. It was found that the impact strength of the injection moulded samples were higher than the extruded samples and the virgin PP. The tensile properties (yield stress and modulus) were dependent on the amount of rubber dust addition. An increase in the rubber dust loading gave lower yield stress and modulus.
Chemical Surface Treatment of Carbon Black to Enhance Interfacial Adhesion Between Elastomer and Carbon Black
Kim, Jeong-Soon ; Lee, Jae-Rock ; Shin, Chae-Ho ; Nah, Chang-Woon ; Park, Soo-Jin ;
Elastomers and Composites, volume 34, issue 3, 1999, Pages 222~228
In this work, the effect of chemical treatments on the carbon blacks as-received has been studied in the context of surface, adsorption, microstructure properties, and physical surface free energetics. As an experimental result, the basic chemical treatment leads to an increase in the either dispersive or specific component without significant change the pH and specific surface area. While, acidic chemical treatment do significantly change the surface and adsorption properties, and microstructures of the carbon blacks. In particular, the result given by basic chemical treatment shows an increase of the London dispersive component of the surface free energy which is a major parameter in evaluating the dispersion or specific surface area of the carbon blacks studied. This is probably a major role in evaluating the dispersion the carbon blacks, which are reinforced in elastomer matrix in a composite system.
Preparation of Sulfur Crosslinkable EVA and Blend With Rubbers
Jin, Je-Yong ; Choi, Sei-Young ;
Elastomers and Composites, volume 34, issue 3, 1999, Pages 229~238
In this study, double bond, unsaturated group was introduced to the main chain of EVA by chemically treating EVA, nondiene polymer. Benzene sulfonic acid, ENB and DCPD were used as a third element. Also, from blending CR and SBR, conventional synthetic rubber we prepared vulcanizates and examined their physical properties. The datum lead to the following conclusion that some problems were modified; limited temperature in use and mechanical properties like hardness, tensile strength, tensile stress, and elongation rate of thermoplastic EVA, keeping the following advantages of original EVA; green strength, injection molding by Pressure, adhesion, tackiness, dimensional stability, and ozone resistance, etc. It is expected that continuous research of the modification between nondiene and diene polymer will improve what were shown disadvantages in synthetic polymer; processing, oxidation resistance, and adhesion. In addition, it will be possible to continue process of rubber products by utilizing possible fluidity for fusion of EVA.
Effect of Solvents as Subcritical and Supercritical Fluid on Decomposition and Extraction of Used Automotive Tire
Kang, W.S. ; Na, D.Y. ; Kim, I.S. ; Han, S.B. ; Park, P.W. ;
Elastomers and Composites, volume 34, issue 3, 1999, Pages 239~246
Side wall samples from a used automotive tire were subjected to subcritical and supercritical decomposition and extraction with three solvents, water, 28% ammonia solution and ammonia. For 6mm cube samples the rate of supercritical extraction with water followed a first-order kinetics with an activation energy of 140 kJ/mol. Solvent power of 28% ammonia so lotion at supercritical condition was found to be higher than supercritical water at initial extraction as pressure decreased. These phenomena were considered to be an effect of ammonia involved in water.
Assessment of Geosynthetic Properties of Rubber Reinforced Composites
Jeon, H.Y. ;
Elastomers and Composites, volume 34, issue 3, 1999, Pages 247~252
Rubber related geosynthetics(GS) as reinforcement and water barrier materials were manufactured by thermal bonding method and examined the their performance for applications to civil and environmental engineering fields. The spunbonded polyester nonwoven, fiber glass mat and fabric type geogrid of a high tenacity polyester filament were used as matrix and polyester film, elastomeric bitumen with SBS polymer and asphalt were used as reinforcements to manufacture the rubber related geosynthetics. A fiber glass mat and geogrid matrix GS showed more excellent mechanical properties and nonwoven and elastomeric bitumen matrix showed the more excellent permittivity. Softening points of rubber and asphalt mixture showed no difference and dimensional stability at high temperature,
, represented no significant shrinkage. Resistance to ultraviolet of rubber related geosynthetics showed no visible alteration.
Adhesion Properties of Rubber Composite with Direct Blending Technique and Adhesive Composition
Lee, Seong-Jae ; Chang, Young-Wook ; Chung, Kyung-Ho ;
Elastomers and Composites, volume 34, issue 3, 1999, Pages 253~261
The cure properties of rubber compounds containing different adhesive compositions were examined. As the amounts of tannin were increased in the adhesive composition, the scorch time was increased and cure rate was decreased due to the size and shape of tannin molecules. Also, the effect of adhesive composition on the adhesion between rubber and fiber was examined by TCAT(Tire Cord Adhesion Test), The reinforcing cords used in this study were mon ofilaments of nylon 610 and nylon 66. According to the results, the optimum adhesion strength between rubber and fiber could be obtained with adhesives whose molar ratios of formaldehyde/resorcinol were above 5/1 in the recipes. Although the level of dip pick-up(DPU) on the reinforcing cord affects the adhesion strength, the DPU of nylon 610 monofilament did not affect the adhesion strength because the level of DPU was constant regardless of the adhesive compositions. In this case, the adhesion strength with the adhesive composition could be explained with the behavior of tannin in the adhesive.
Effects of Carbon Blacks on Viscoelastic Behavior of Natural Rubber Melt
Shin, Soo ; Choi, Chang-Nam ; Nah, Chang-Woon ; Kaang, Shin-Young ;
Elastomers and Composites, volume 34, issue 3, 1999, Pages 262~268
Effect of carbon blacks (CBs) on the stress relaxation and the elastic recovery of uncrosslinked natural rubber (NR) was examined. It was found that if the type of CB is characterized by smaller size and higher structure, the stress relaxation is more delayed and the elastic recovery becomes more active. These results are attributed to the degree of bound rubber, i.e., the interaction between NR and CB.