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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 41, Issue 4 - Dec 2006
Volume 41, Issue 3 - Sep 2006
Volume 41, Issue 2 - Jun 2006
Volume 41, Issue 1 - Mar 2006
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Computer Simulation of Viscoelastic Flow in a Capillary Die for Rubber Compounds
Park, Dong-Myung ; Kim, Hok-Joo ; Yoon, Jae-Ryong ; Lyu, Min-Young ;
Elastomers and Composites, volume 41, issue 4, 2006, Pages 223~230
Rubber compounds have a high viscoelastic property. One of the viscoelastic behaviors during profile extrusion is the swelling of extrudate, and the amount of swelling varies with operational conditions in extrusion. It is well recognized that the elastic portion in the viscoelastic property plays an important role in the extrudate swell. In this study computer simulation of the die swell at the capillary die for several rubber compounds has been performed using commercial CFD code, Polyflow. A non-linear differential viscoelastic model, Phan-Thien-Tanner (PTT) model, was used in the computer simulation. Non-isothermal behavior was considered in the calculation. Distribution of pressure, velocity and temperature in the reservoir and capillary die, and extrudate profiles were predicted through the simulation. The amount of the die swell fur the different rubber compounds was investigated for various flow rates and three types of length to diameter of the capillary die. It is concluded that the PTT model successfully represented viscoelastic behavior of rubber compounds.
Electrochemical Properties of Biosensor with Butyl Rubber Binder
Choi, Sei-Young ; Yoon, Kil-Joong ;
Elastomers and Composites, volume 41, issue 4, 2006, Pages 231~237
An enzyme electrode bound by butyl rubber was newly constructed for the determination of hydrogen peroxide and for the practical application as a biosensor. Then its electrochemical properties were investigated. It produced a hundreds-fold increased signal compared to the plant or animal tissue based biosensor studied previously and could be run at between
(vs. Ag/AgCl). The relationship between signal and electrode potential was linear in the experimental range of potential. It showed a detection limit of
and a very good linearity of Lineweaver-Burk plot giving the proof of a good enzyme immobilization. Especially, both the reproducibility of signal current due to its high sensitivity and mechanical stability presented a new possibility for the practical use of biosensor bound with butyl rubber.
Factors Affecting the Grafting of Aminopropyltriethoxysilane in Swelling Clay Materials
Shanmugharaj, A.W. ; Lee, Kyong-Yop ; Ryu, Sung-Hun ;
Elastomers and Composites, volume 41, issue 4, 2006, Pages 238~244
Functionalization of montmorillonite clay has been done using 3-aminopropyltriethoxy silane using water as a dispersing medium. Qualitative evidence of the presence or silane attached to the clay surface has been identified using Fourier transform infrared spectroscopy (FT-IR). Increase in silane concentration decreases the adsorbed/intercalated ratio calculated using differential thermogravimetric analysis (DTG). Average d-spacing calculated using X-ray diffraction initially increases with silane concentration and decreases slightly at higher silane concentration. The influence of processing temperature on the silane functionalization of clay has also been investigated and it shows that chemical grafting of silane on the clay surface is observed with increasing processing temperature.
Effect of Zinc Dimethacrylate on Mechanical Properties of Dynamically Vulcanized Polypropylene(PP) and Nitrile rubber(NBR) Blends
Lee, Jung-Won ; Joo, Hyun-Seok ; Kong, Shin-Choon ; Chong, Young-Wook ;
Elastomers and Composites, volume 41, issue 4, 2006, Pages 245~251
Thermoplastic elastomer was prepared from dynamical vulcanization of isotactic polypropylene(iPP)/nitrile rubber blend (NBR/iPP=70/30 wt/wt) in an internal mixer using dicumyl peroxide (DCP) as a curing agent and zinc dimethacrylate (ZDMA) as a coagent. There was a great improvement in tensile and tear strength, elongation-at-break and lower tension set when ZDMA was incorporated into the blend, which is supposed to be due to the increase in crosslink density or the rubber phase and the reduction in size of the rubber particles. It was revealed that the dynamically vulcanized blend exhibited good reprocessibility, indicating its thermoplastic nature.
Preparation and Characterization of Rubber/Clay Nanocomposite Using Skim Natural Rubber Latex
Alex, R. ; Kim, M.J. ; Lee, Y.S. ; Nah, C. ;
Elastomers and Composites, volume 41, issue 4, 2006, Pages 252~259
A new route for making rubber/clay nanocomposites was suggested based on skim natural rubber latex (SNRL), which is a protein rich by-product obtained during the centrifugal concentration of natural rubber (NR) latex. NR/acrylonitrile butadiene rubber (NBR) based nanocomposites were prepared from SNRL and NBR latex of 26 % acrylonitrile content by blending of aqueous dispersion of organoclay (OC) followed by coagulation, drying, mill mixing and vulcanization. X-ray diffraction(XRD) studies revealed that NR/NBR blend nanocomposites exhibited a highly intercalated and exfoliated structure, especially for NBR-rich blends. Dynamic mechanical studies showed that more compatible behavior was observed for NBR-rich blends. The 25/75 NR/NBR blend nanocomposite showed the best mechanical properties.
Effect of organoclay on the dynamic properties of SBR compound reinforced with carbon black and silica
Son, M.J. ; Kim, W. ;
Elastomers and Composites, volume 41, issue 4, 2006, Pages 260~267
SBR (styrene-butadiene rubber; 25 wt% of solid contents) nanocomposites reinforced with OLS(organically modified layered silicates) were manufactured via the latex method. Two types of OLS are prepared, i.e. dodecylamine (primary amine) modified montmorillonite (DA-MMT) and N, N-dimethyldodecylamine (tertiary amino) modified MMT (DDA-MMT). X-ray diffraction (XRD) and transmission electron microscopy (TEM) were employed to characterize the layer distance of OLS and the morphology of the nanocomposites. SBR nanocomposites reinforced with ternary phase filler (carbon black/silica/OLS) systems also manufactured. Dynamic mechanical thermal analysis (DMTA) was performed on these composites to determine the loss factor (tan
) over a range of temperature(
). The results showed that there was significant changes on the values or tan
with the addition of small amount of the OLS. By increasing the contents of OLS, the values of tan
increased but those of tan
decreased with increasing OLS contents.