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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 30, Issue 4 - Oct 1995
Volume 30, Issue 3 - Aug 1995
Volume 30, Issue 2 - May 1995
Volume 30, Issue 1 - Mar 1995
Selecting the target year
Preparation of Silicone Rubber Membrane and its Porosity
Lee, Seung-Bum ; Kim, Hyung-Jin ; Hong, In-Kwon ;
Elastomers and Composites, volume 30, issue 3, 1995, Pages 185~194
Membrane process has been employed to separate a specific substance from gas or liquid mixture, and treat wastewater. This is due to the fact that the substance of mixture can be permeated and separated selectively by membrane. Since Initial equipment and operation costs are not expensive, membrane process has been adopted in various fields such as petroleum Industry, chemistry, polymer, electronics, foods, biochemical industry and wastewater treatment. In this study,
particles impregnated in silicone rubber network were extracted by using supercritical carbon dioxide and pore distribution of silicone
was investigated with varying amount of extract. Silicone rubber has excellent mechanical properties such as heat-resistance, cold-resistance etc. and
has microporous structure. It is possible to make silicone
composite sheets via work-intensive kneading processes. In so doing
particles become distributed and impregnated in silicone rubber network. Supercritical carbon dioxide diffuse through composite sample, then sample is swollen.
in silicone rubber network Is dissolved in supercritical carbon dioxide, and its sites become pores. Pore distribution, pore shape and surface area are observed by SEM(scanning electron microscope) micrograph and BET surface area analyzer examination respectively. Pore characteristics of membrane suggest the possibilities that the membrane can be used for process of mixture separation and wastewater treatment.
A Study on Modification of NBR Rubber Roll (I) -NBR/PVC Blend Systems-
Seo, Kwan-Ho ; Ko, Young-Cheol ; Ha, Hyun-Dal ; Cho, Ur-Ryong ;
Elastomers and Composites, volume 30, issue 3, 1995, Pages 195~206
To modify the NBR rubber roll which has poor abrasion and chemical resistance, NBR/PVC blends were prepared in various composition ratios. First of all, their miscibility and vulcanization characteristics were investigated. Their abrasion and chemical resistant properties and physical properties were also studied. DSC thermograms for NBR/PVC blends show only one Tg in the entire composition range, demonstrating a perfect miscibility. In the vulcanization characteristics tested by rheometer, maximum torque decreases as PVC contents increased. In the investigation of physical properties of NBR/PVC blends, hardness increases and elongation decreases along with the increasing contents of PVC. On the other hands, tensile strength increases with the increasing contents of PVC up to 11.1 wt. %, and then decreases with higher contents of PVC. While the abrasion resistance of NBR/PVC blends was similar to that of NBR itself, the chemical resistance of NBR/PVC blends was superior to that of NBR.
Studies on the Chemical Treatment of Silica for Synthetic Rubber Reinforcement (II) -Silica Treatment by LBR-MDI-
Jin, Je-Yong ; Kim, Hong-Seon ; Choi, Sei-Young ;
Elastomers and Composites, volume 30, issue 3, 1995, Pages 207~217
The reinforcement of Inorganic filler silica treated with LBR-MDI In SBR vulcanizates were Investigated. The inorganic filler silica treated with MDI on unmodified surface and that of silica treated by MDI was retreated with LBR. The charateristics of vulcanization, physical properties, surface properites and dynamic properties were investigated after mixing those silica with SBR and unmodified silica with SBR. Rheometric studies of the vulcanization showed that S-series has fast scorch
and an optimum cure
in the SBR compounds. And it was turned out that SBR vulcanizates compounded with LBR treated silica was better than any other componnds in hardness, tensile strenght, 100 300% modula and elongation. We could confirm that urea bonding is formed from IR spectrum. We concluded that L-series shows the best reinforcement effect in SBR vulcanizates.
A Study on the Manufacturing and Physical Properties of Conducting Rubber (II) -Barium ferrite System Conducting Rubber-
Lee, Young-Man ; Yun, Ju-Ho ; Choi, Sei-Young ;
Elastomers and Composites, volume 30, issue 3, 1995, Pages 218~228
To make filler loaded conducting rubber which has excellent electronical and physical properties, CR and NBR were mixed with barium ferrite(BaO.6Fe2O3). From the result of this study, vulcanization characteristics shows that curve is upgraded as the filler concentration increases and CR has higher torque than NBR. In physical properties, elongation being higher, modulus comes to decrease. Tear strength gradually decrease after showing the maximum point when is in the 100phr in CR. Resilience is not good to cause the increase in filler concentration. In electrical properties, conductivity becomes low when filler concentration increase. The increase of voltage makes a conductivity grown, but the rate change is weak. The influence of temperature hardly changes on increasing temperature. The morphology and the dispersion of a conductivity filler in vulcanizates through SEM were good. The more filler concentration increases, the shorter the particle interval is.
Removal of a Heavy Metal from Wastewater using Membrane Process and Instrumental Analysis
Park, Kyung-Ai ; Lee, Seung-Bum ; Kim, Hyung-Jin ; Hong, In-Kwon ;
Elastomers and Composites, volume 30, issue 3, 1995, Pages 229~234
Membrane process has been applied widely to petroleum chemistry, fine chemistry, polymer, electronics, food, bioprocessing, and wastewater treatment process. Membrane process has advantage that there's no phase change through separation, energy consumption is smaller than other separation processes. And equipment investment and operation cost are inxpensive too. We prepared the silicone rubber membrane and then separated the heavy metal ion from wastewater. Silicone rubber membrane was prepared using a superitical fluid process and heavy metal ions were separated from the chromium nitrate, ferric sulfate, cupric sulfate, nickel sulfate aqueous solution. The pressure difference between top and bottom of separation apparatus was preserved by vacuum pump, and the removal amount of heavy metal at each separation step were analyzed by instrumental analysis, AAS. The surface and pore of silicone rubber membrane was investigated using SEM, and the capability of wastewater treatment using a silicone rubber membrane was proposed as calculated removal rate of heavy metal after comparing removal amount of heavy metal to amount of heavy metal in mother solution by AAS analysis.
Pressurization and Initial Extrusion of a Squeezed O-Ring into a Clearance Gap
Kim, Won-Ho ;
Elastomers and Composites, volume 30, issue 3, 1995, Pages 235~246
When an O-ring is installed in a high fluid pressure device, a section of the O-ring is extruded into the piston-cylinder clearance gap. Any tendency towards extrusion will induce wear in dynamic applications, leading to premature failure of the seal. In this study, the mechanism of initial extrusion of the O-ring was studied, 1.e., how much amount of the O-ring will be extruded into the clearance gap at a certain pressure. The relationship between extrusion depth and a clearance gap or fluid pressure were studied by finite element analysis (FEA). After that, Salita's experimental data were analyzed. The result is that Initial extrusion depth for an O-ring into a clearance gap was 1.11 times the product of dimensionless pressure difference
and clearance gap c. The required pressure
for zero extrusion depth was found to decrease logarithmically with increasing clearance gap.
Jo, Gil-Won ; Lee, Dae-Ho ;
Elastomers and Composites, volume 30, issue 3, 1995, Pages 247~253