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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 50, Issue 4 - Dec 2015
Volume 50, Issue 3 - Sep 2015
Volume 50, Issue 2 - Jun 2015
Volume 50, Issue 1 - Mar 2015
Selecting the target year
Study on the Functionalization of Waste EPDM and PP Blend
Chung, Kyungho ; Kim, Jinhee ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 245~250
DOI : 10.7473/EC.2015.50.4.245
Recycling of ethylene-propylene-diene terpolymer (EPDM) scrap was tried by blending with polypropylene (PP). EPDM scrap powder was prepared by shear pulverization process at high temperature, which may lead to selective chain scission induced by difference in the critical elastic coefficient. On the other hand, EPDM scrap powder was prepared by adding a selected reclaiming agent during shear pulverization process at high temperature. Terpene as a bonding agent was then introduced to improve adhesion property. PP, used as a matrix for manufacturing thermoplastic elastomer, was modified by the incorporation of dicumyl peroxide and maleic anhydride. The functionalized EPDM and modified PP were blended and cured dynamically at
. The blend materials prepared in this study showed the comparable results to those of conventional TPE in terms of tensile and flow properties. Also, the odor component of recycled EPDM was analyzed using GC-MS.
Simulation and Experiment of Elastomer Seal for Pneumatic Servo Cylinder
Hur, Shin ; Song, Kyung Jun ; Woo, Chang Su ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 251~257
DOI : 10.7473/EC.2015.50.4.251
The rubber seal is a part inserted into servo cylinder to keep the air pressure constant. In order for efficient movements of the servo cylinder, the frictional coefficient of the rubber seal needs to be minimized while the sealing is maintained. In this work the friction characteristics of rubber seal specimen are tested on metal plate at various conditions. The experimental conditions include roughness level, applied pressure, lubrication, and rubbing speed. The design of experiment approach is taken to assess the effect of each parameter. The nonlinear frictional response of the rubber is applied to the FEM model simulating the servo cylinder movement. The result demonstrates that precise optimization of the servo cylinder movement must be preceded by preliminary experiments coupled with the theory and FEM model.
The Effect of the Shape of the Precured CIIR on the Physical Properties of the BR/CIIR Composites
Pyo, Kyeongdeok ; Park, Chacheol ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 258~264
DOI : 10.7473/EC.2015.50.4.258
Rubber composites were prepared by precured CIIR pulverized at knead shear force in order to research the effects of the BR/PCP composites. The particle size of domain in BR/CIIR composites was decreased and homogeneously dispersed by the precured CIIR pulverized. However, it was difficult to use the product when the content is 40 phr and precured of 40%. BR/PCP composites have improved mechanical properies as compared that of the addition of simply cut chip composite.
Phase Inversion Emulsification and Enhancement of Physical Properties for Cationic Emulsified Asphalt
Lee, Eun-Kyoung ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 265~273
DOI : 10.7473/EC.2015.50.4.265
In this work, the emulsified asphalt with high phase stability and storage stability was prepared by using phase inversion emulsification and the surfactant mixed with cationic and nonionic surfactants. It was found that the asphalt together with Span 20, nonionic surfactant and DDA (Dimethyl Dodecyl Amine), cationic surfactant showed the most stable phase. The phase stability of the emulsified asphalt, therefore, was investigated through the particle size with mixed surfactant content, rheology behavior and Zeta potential value; the particle size decreased with the increase of the mixed surfactant content but the viscosity increased. The shear thinning behaviors and the Zeta potential value with 50 mV~60 mV were shown, which was found to be considered stable. In addition, SBR latex(Styrene-butadiene-rubber) and water dispersed Epoxy (EPD) were used to enhance the physical properties of the emulsified asphalt. The swelling and adhesion features of the emulsified asphalt were also studied with
, Silica, and Montmorillonite (MMT). It was shown that the addition of SBR latex and MMT can be another way to improve the physical properties of the emulsified asphalt in that the lowest swelling feature was found.
Preparation of Nanosized Gold Particles by Microwave Irradiation and Kinetics Study for Reduction of 4-Nitroaniline under Various Conditions
Kim, Jae Jin ; Ko, Weon Bae ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 274~278
DOI : 10.7473/EC.2015.50.4.274
Nanosized gold particles were synthesized by microwave irradiation in a mixture composed of potassium tetrachloroaurate(III) n-hydrate, sodium citrate dihydrate and Tween 20. The synthesized gold particles were characterized by UV-vis spectrophotometer, scanning electron microscopy, and X-ray diffraction techniques. Using UV-vis spectroscopy, it was confirmed that gold nanoparticles act as a catalyst in the reduction of 4-nitroaniline with sodium borohydride to form 1,4-diaminobenzene. Additionally, we studied the kinetics of this reductive reaction in the presence of these gold nanoparticles under various conditions.
Fire Resistance Properties of Chloroprene Rubber containing Inorganic Flame Retardant
Sung, Il Kyung ; Park, Chan Young ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 279~285
DOI : 10.7473/EC.2015.50.4.279
This study examined the mechanical properties and the flame retardant properties of CR rubber containing inorganic flame retardant with various contents of aluminium trihydroxide (ATH,
). The content of aluminium trihydroxide was added in 0, 30, 50, 70 and 100 phr for T1~T5 samples. It was found that increasing the amount of addition over 30 phr resulted in decreasing the mechanical properties. On the other hand in oxygen index measurements T1 sample showed a value of 38.6%, indicating the improvement of flame retardant properties showed a value of 49.7~64.2%. In case of burn test, it was confirmed that CR rubber containing over ATH 50phr content showed performance corresponding to that of first grade fire-resistance.
Effect of Initiator on Performance of Polyvinylacetate as Emulsion Adhesive
Lee, Kangseok ; Shim, Sang Eun ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 286~291
DOI : 10.7473/EC.2015.50.4.286
Polyvinylacetate (PVAc) was prepared using thermal initiation and redox initiation via emulsion polymerization at
. The polymerization conditions had a significant effect on the properties of the synthesized PVAc. When hydrogen peroxide and tartaric acid as the initiator for redox polymerization were used, the synthesized PVAc had a low molecular weight. In comparison with thermal polymerization, smaller PVAc particles were formed during the redox polymerization due to relatively faster polymerization rate, which in turn resulted in improved adhesion property. It is considered that the rapid generation of smaller particles induces the formation of a large surface area.
Aging Effect of Bio-inspired Artificial Basilar Membrane with Piezoelectric PVDF Thin Film
Kim, Wan Doo ; Park, Su A ; Kim, Sang Won ; Kwak, Jun-Hyuk ; Jung, Young Do ; Hur, Shin ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 292~296
DOI : 10.7473/EC.2015.50.4.292
Biomimetic artificial basilar membrane being a core part of artificial cochlear requires performance evaluation through aging test. To evaluate the aging properties of PVDF piezoelectric membrane used for artificial basilar membrane, its mechanical properties such as tensile strength and elastic modulus and piezoelectric property such as piezoelectric constant were measured. The aging test conditions and acceleration constants were calculated based on Arrhenius model. The changes in tensile strengths and elastic moduli measured were less than 10~20% after aging test equivalent for 10 years. The piezoelectric constants were decreased drastically to 80% of its initial value in the early stage of the aging test and expected to decrease slowly down to 65% over 10 years. The experimental results show the reliability of totally implantable novel artificial cochlear and will contribute its commercialization.
Thermal Decomposition of Ammonium Polyphosphate-Polyurethane Composite Foam Brown by H
Park, Kyeong-Kyu ; Lee, Sang-Ho ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 297~303
DOI : 10.7473/EC.2015.50.4.297
Ammonium polyphosphate-polyurethane foam composite (APP-PUF) was prepared from poly(adipate)diol/ammonium polyphosphate composite (f = 2), polyether polyol (f = 4.6), and PMDI (f = 2.5). As a blowing agent,
was used at various concentrations. The thermal decomposition behavior, morphology, closed-cell content, and density of APP-PUF were characterized. At the
concentrations lower than 3.5 php, the cell size of pure polyurethane foams (PUF) and APP-PUFs were close each other. As the
concentration became greater than 5.0 php, the cell size of the PUFs greatly increased compared to that of APP-PUFs. Addition of 1.5~1.9 wt% ammonium polyphosphate to the PUFs greatly enhanced the thermal stability of the PUFs, so 50 wt% residual temperature of APP-PUFs increased to
, which were
higher than those of the PUFs. Thermal stability of the PUFs and APP-PUFs increased with
content and then decreased once
content exceeded 5 php.
Preparation and Characterization of Anionic Emulsified Asphalt with Enhanced Adhesion Properties
Lee, Eun-Kyoung ;
Elastomers and Composites, volume 50, issue 4, 2015, Pages 304~313
DOI : 10.7473/EC.2015.50.4.304
In this study, the anionic emulsified asphalt was prepared by dispersing asphalt particles evenly into water with combination of anionic and nonionic surfactants. Effects of NaOH and
on the phase stability of the emulsified asphalt were also investigated through zeta potential value and rheology behavior; the emulsified asphalt added with NaOH and
showed higher zeta potential value than that the asphalt with addition of only anionic and nonionic surfactants. In addition, with regard to shear thinning behaviors, it was found that pH of the emulsified anionic asphalt and
, counter ion, affected the phase stability. SBR (styrene-butadiene-rubber) latex, EPD (water dispersed Epoxy), PU (polyurethane) and RI-10S, SBS (styrene-butadiene-styrene)-based property improvement additive, were used and studied to enhance the adhesion properties with the aggregates. RI-10S, however, was found to be only compatible with the anionic emulsified asphalt; the coating rate, adhesion and compression strength were increased with the RI-10S content.