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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 43, Issue 4 - Dec 2008
Volume 43, Issue 3 - Sep 2008
Volume 43, Issue 2 - Jun 2008
Volume 43, Issue 1 - Mar 2008
Selecting the target year
Emerging Technologies of Elastomers
Jeong, Kwang-Un ; Jin, Kwang-Yong ; Nah, Chang-Woon ; Lee, Myong-Hoon ;
Elastomers and Composites, volume 43, issue 2, 2008, Pages 63~71
Up to now, most of researches and practical applications of polymeric elastomers have been focused on rubber, a type of elastomeric materials. Therefore, it has been widely accepted that rubber industry is tire industry. In this review, we would like to illuminate new emerging technologies of elastomers. Among many examples, there are actuators which can transform their mechanical shapes with respect to the surrounding environments. Paper folding (so called "origami" in Japanese) technology can be another good example. Utilizing paper folding technology, three-dimensional (3D) architectures containing multi-functions can be constructed from programmed 2D structures. Elastomer microlens can also be fabricated using lithography technologies combined with chemical reactions.
Improvement of Deformation Resistancy of Asphalt by Modification with Tire Rubber
Hong, Young-Keun ; Ko, Mun-Bo ;
Elastomers and Composites, volume 43, issue 2, 2008, Pages 72~81
Nowadays, modifying asphalt to improve the resistancy of plastic deformation or rutting on roads has been drawing attention. In this study, asphalts were modified with modifying agents and ground rubber from waste tire (GRT), and the effects of modifier and GRT on the properties of asphalt were analyzed. The Marshall stability of modified asphalt was increased by 98% and the tensile strength increased by 43% compared to straight asphalt. GRT played an important role in enhancing these properties. Viscosity tests, penetration tests and TMA analysis showed the deformation resistancy of modified asphalt. IR and GPC tests indicated that asphalt and modifier have similar chemical structures to each other, and chemical bonding between asphalt and modifier have occurred so that the molecular size lengthened.
Synthesis of the Low-Hygroscopic Polyimide for 2-Layer Flexible Copper Clad Laminate
Kim, W. ; Park, S.J. ; Baek, J.O. ; Gong, H.J. ; Ahn, B.H. ;
Elastomers and Composites, volume 43, issue 2, 2008, Pages 82~87
In this study, nine kinds of polyimides were synthesized from 1,2,4,5-benzenetetracarboxylic dianhydride (PMDA), 4,4'-(4,4'-isopropylidenediphenoxy)bis(phthalic anhydride) (BPADA), m-pheny lenediamine (m-PDA) and 4,4'-oxydianiline (ODA) by controlling molar ratio of monomers. Synthesized polyimides were used as insulator films for 2-layer Flexible Copper Clad Laminate(FCCL) which were manufactured by the casting method. Glass transition temperature and thermal degradation temperature for 5% weight loss of the polyimide film were improved by increasing contents of m-PDA and PMDA, respectively. Water absorption of polyimide film was reduced by increasing contents of ODA and BPADA which have relatively long structure, respectively. Peel strength of 2-layer FCCL was improved by increasing contents of ODA and BPADA.
Application of Various Types of Surfactants for Improving Hydrophilic Properties of Polyvinylsiloxane Dental Rubber Impression Materials and its Effects on Physical Properties
Park, Yeong-Joon ; Hwang, Moon-Jin ; Kim, Min-Kang ; Song, Ho-Jun ; Ha, Kwang ; Kang, Shin-Young ;
Elastomers and Composites, volume 43, issue 2, 2008, Pages 88~103
This study was purposed to investigate the effects of surfactants and fillers on physical properties of hydrophilic polyvinylsiloxane dental impression materials (PVS). Incorporation of surfactants enhanced the hydrophilicity of the PVS, however, it induced increased viscosity and permanent deformation ratio, delayed setting, and decreased tensile strength. At high concentrations of surfactant, the tensile strength was observed to decrease significantly due to the internal pore formation. Especially, the hydrophilicity of the PVS was significantly enhanced with the addition of Silwet L-77. However, the viscosity, strain in compression, pore formation, and setting time increased whereas the elastic recovery rate and strength remarkably decreased. The PVS dental materials containing Span 20 showed the lowest degree of viscosity increase, delayed setting, pore formation, and hydrophilicity. The delayed setting, pore formation, and strength decrease caused by the incorporation of surfactant were improved by substituting the crystalline quartz filler with diatomaceous earth while the contact angle of PVS dental materials increased.
Cure characteristics, Mechanical Properties and Ozone Resistance of EPDM/SBR Blend Vulcanizates
Park, Chan-Young ;
Elastomers and Composites, volume 43, issue 2, 2008, Pages 104~112
The ethylene propylene diene terpolymer (EPDM) blends with styrene butadiene rubber (SBR) were prepared from an open 2-roll mill following the conventional rubber blend method, and then cure characteristics, mechanical properties and ozone resistance were subsequently examined. With incorporation of SBR the torque value of the EPDM and SBR blends showed a gradual increase in the cure curve. The maximum torque value was obtained with lowest level at 25wt% of SBR and it was increased linearly with more than 25wt%. As the SBR loading increased scorch time and optimum cure time decreased. Hardness represented a maximum at 50wt% of SBR. However upper and lower than that value it decreased. It was found that the unfavorable characteristics of ozone resistance of pure SBR was significantly improved through the blending of SBR with EPDM.
Influences of Liquid Rubber on the Surfacial and Mechanical Properties of Epoxy Composites
Choi, Sei-Young ; Chu, Jeoung-Min ; Lee, Eun-Kyoung ;
Elastomers and Composites, volume 43, issue 2, 2008, Pages 113~123
Epoxy resins are thermoset polymers that exhibit good adhesion, creep resistance, heat resistance, and chemical resistance. These polymers, however, give poor resistance to crack propagation and low impact strength. In this study, epoxy/carboxyl-terminated butadiene acrylonitrile (CTBN) and epoxy/amine-terminated butadiene acrylonitrile (ATBN) composites were prepared with different ratio of CTBN and ATBN to improve low impact strength of epoxy resin. The impact strength of epoxy/elastomeric composites shows high values with increasting nonpolar surface free energy while the tensile strength and the glass transition are decreased. The highest surface free energy, impact strength observed when 15 phr CTBN and 15 phr ATBN added, respectively. It can be concluded that as liquid rubber to improve impact strength of epoxy resin, ATBN is more preferable to CTBN.
Preparation and Characterization of Antimicrobial Polyurethane Foam Modified by Urushiol and Cardanol
Kim, S.B. ; Kang, S.K. ; Cho, I.S. ;
Elastomers and Composites, volume 43, issue 2, 2008, Pages 124~132
Thermal and mechanical properties of flexible polyurethane foam modified by urushiol and cardanol which have been known to be antibiotic were investigated. It was observed from FT-IR spectra analysis that the urushiol reacted with isocyanate was participated in synthesis of polyurethane. It was also seen that the modification using urushiol and cardanol made the PU more thermally stable without deterioration of mechanical properties. The modified PU foams showed increased antibacterial properties compared with neat PU foam.