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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 44, Issue 4 - Dec 2009
Volume 44, Issue 3 - Sep 2009
Volume 44, Issue 2 - Jun 2009
Volume 44, Issue 1 - Mar 2009
Selecting the target year
Silicone Rubbers in Medical Engineering for Rehabilitation
Lee, Suk-Min ; Song, Jeom-Sik ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 2~12
Naturally Cyclable Biocomposites
Cho, Dong-Hwan ; Kim, Hyun-Joong ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 13~21
Bang, Dae-Suk ; Kye, Hyoung-San ; Cho, Ur-Ryong ; Min, Byung-Gak ; Shin, Kyung-Chul ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 22~33
Recently, elastomer-nanocomposites reinforced with low volume fraction of nanofillers have attracted great interest due to their fascinating properties. The incorporation of nanofillers, such as, layered silicate clays, carbon nanotubes, nanofibers, calcium carbonate, metal oxides or silica nanoparticles into elastomers improves significantly their mechanical, thermal, dynamic mechanical, barrier properties, flame retardancy, etc. The properties of nanocomposites depend greatly on the chemistry of polymer matrices, nature of nanofillers, and the method in which they are prepared. The uniform dispersion of nanofillers in elastomer matrices is a general prerequisite for achieving desired mechanical and physical characteristics. In this paper, current developments in the field of elastomer nanocomposites reinforced with layered silicates, silica, carbon nanotubes, nanofibers and various other nanoparticles have been addressed.
Synthesis and Characterization of Silica/Polystyrene Composite Nanoparticles by in situ Miniemulsion Polymerization
Patole, Archana S. ; Patole, S.P. ; Song, Mi-Hyang ; Yoon, Joo-Young ; Kim, Jin-Hwan ; Kim, Tae-Ho ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 34~40
New coupling agent or surface modified agent (9-decenoic acid) was used to enhance the compatibility between silica and polystyrene in silica/polystyrene hybrid nanocomposite, synthesized by in situ miniemulsion polymerization. Composites contain well dispersed nanosize silica particles. Related tests and analyses confirmed the success of synthesis. Functionalization of silica by 9-decenoic acid and silica on the polystyrene was confirmed by FTIR. TGA showed presence and amount of silica in final latex. The glass transition temperature of the hybrid nanocomposite was increased with the silica amount. SEM and TEM analysis showed the spherical morphology of PS and composite with an average diameter of 55 nm. The presence of silica within composite was confirmed by EDS attached to the existing TEM.
Effects of Temperature and Curing Systems on Compression Set of NR Compounds at Constant Load
Jin, Hyun-Ho ; Hong, Chang-Kook ; Cho, Dong-Lyun ; Kaang, Shin-Young ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 41~46
The effects of temperature and curing systems on the compression set of natural rubber (NR) at constant load were investigated. NR was compounded with various amounts of sulfur and DCP in order to obtain various crosslink densities and curing systems. Compression sets at constant load were compared with those at constant strain. Compression set at constant load was more affected by changes in crosslink density than compression set at constant strain, due to the differences of exerted strain energy density. Compression set of sulfur cured NR under constant load was increased with increasing load and temperature, but the compression set of DCP cured NR was not changed by increasing load and temperature.
Effects of Reinforcing Fillers on Far-infrared Vulcanization Characteristics of EPDM
Kim, J.S. ; Lee, J.H. ; Jung, W.S. ; Bae, J.W. ; Park, H.C. ; Kang, D.P. ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 47~54
EPDM(Ethylene-propylene-diene-terpolymer) compound reinforced with carbon black having four different particle size, acetylene black(thermal conductivity carbon black), and silica were manufactured by internal mix and open mill. To investigate the effect of particle size of filler and filler type on far-infrared vulcanization, intermal temperature of compound, degree of curing, infrared spectroscopy, and thermal analysis were measured. The thermal conductivity of far-infrared vulcanized EPDM compound increased with increasing particle size of carbon filler, but hot air vulcanized EPDM compound is not affected by particle size. The thermal conductivity was increased in the order of carbon black < silica < acetylene black(thermal conductivity carbon black).
Study on the Polymerization Characteristics of Isoprene through Nitroxide Mediated Controlled/"living" Radical Polymerization Techniques
Hong, Sung-Chul ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 55~62
In this study, investigation on the polymerization characteristics of isoprene through nitroxide mediated controlled/"living" radical polymerization techniques was attempted. In the presence of acetol, linear increase of isoprene conversion with time and low polydispersities of the resulting polymers (
< 1.5) were observed, which suggest successful controlled/"living" radical polymerization of isoprene. The microstructure of the resulting polyisoprene was composed of
22% of 3, 4,
30% of 1, 4-cis and
48% of 1, 4-trans. The optimum polymerization temperature was 145
, below which no significant polymerization behavior was observed. Non-cyclic nitroxide, such as di-tert-butyl nitroxide (DTBN) could not mediate the polymerization, whereas cyclic nitroxides (2, 2, 6, 6-tetramethyl-1-peperidine 1-oxyl (TEMPO) and 4-oxo-2, 2, 6, 6-tetramethyl-1-peperidine 1-oxyl (oxoTEMPO)) were successfully employed for the polymerization. However, isoprene dimerization reaction through Diels-Alder process was also observed at the given polymerization condition, which afforded a significant amount of limonene. Isoprene thermal autoinitiation was also possible, which was, however, considered to be not significant under the given polymerization condition.
A Study on the Modification of Asphalt with Light
Kang, Hyun-Seung ; Hong, Young-Keun ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 63~68
Recently, much attention has focused on the permanent deformation of roads in hot summer and cracks in cold winter, which are detrimental to safe driving. This leads to necessity of modification of asphalt to resist those deformation. In this study, a type of modified asphalt was prepared by addition of a photoinitiator which is activated by ultraviolet lay. The mechanical and rheololgical properties of photoinitiator-modified asphalt were examined using UTM and rheometer. Results showed that the modified asphalt was effected by ultraviolet and thus tensile strength and storage modulus increased, due to molecular attraction, with initiator content and irradiation dose. Thermal analysis showed less weight loss upon photoinitiator-modification and this indicated that the molecular attraction is the result of cross linking reaction between asphalt molecules induced by photoinitiator. According to long term ultraviolet curing test, properties of the photoinitiator-modified asphalt did not decrease or even increase for 20 years. This indicates that useful life of the asphalt could be extended by addition of photoinitiator.
Asphalt Sealant Containing the Waste Lubricant Oil
Kim, Seog-Jun ; Ko, Kum-Jin ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 69~75
Asphalt sealants for the crack repair of asphalt concrete road were prepared using waste lubricant oil in this work. The waste lubricant oil was compounded with asphalt(AP-5), SBS triblock copolymer, a tackifying agent(petroleum resin), and antioxidants. Cone penetration, softening point, ductility, elongation by tensile adhesion, and resilience of asphalt sealant compounds were measured. Cone penetration of asphalt sealant compounds increased with the increase of waste lubricant oil content while their softening point, ductility, and resilience decreased. By the addition of talc as an extender, softening point and resilience of asphalt sealants increased, but cone penetration, ductility, and elongation by tensile adhesion of those decreased with the proportion of talc content. The most economic asphalt sealant which could pass an ASTM specification could be manufactured by the big decrement of petroleum resin content.
Effects of Silicone Polymer Blends on Physical Properties of Dental Polyvinylsiloxane Impression Materials
Lim, Chang-Ha ; Kim, Min-Kang ; Kim, Young-Chul ; Park, Nam-Cook ; Song, Ho-Jun ; Park, Yeong-Joon ;
Elastomers and Composites, volume 44, issue 1, 2009, Pages 76~83
The purpose of this study was to investigate the effects of combined use of several types of silicone polymers on the physical properties of the dental polyvinylsiloxane impression materials (PVS). Four types of silicone prepolymers having different molecular weight and vinyl group position, and two types of cross-linkers having differently located silyl hydride functional groups were used in various combinations for the formulation. The samples containing bimodal or trimodal prepolymers showed higher tensile strength, elongation at break, and elastic deformation than those containing only one type of prepolymer. The samples using CR210 cross-linker which has side- and terminal-silyl hydride groups showed higher elastic deformation and elongation at break than those using CR101 cross-liker which has side-only silyl hydride group. High vinyl content prepolymer having side vinyl group delayed setting even though it enhanced tensile strength. Further studies are needed to clarify the specific role of this component on setting time and to find appropriate controlling methods for making improved PVS with optimum workability.