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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 38, Issue 4 - Dec 2003
Volume 38, Issue 3 - Sep 2003
Volume 38, Issue 2 - Jun 2003
Volume 38, Issue 1 - Mar 2003
Selecting the target year
An Application of High-Power Ultrasound to Rubber Recycling
Hong, Chang-Kook ; Isayev, A.I. ;
Elastomers and Composites, volume 38, issue 2, 2003, Pages 103~121
The application of powerful ultrasound to rubber recycling is a very recent field of study. An ultrasonic field creates high frequency extension-contraction stresses by acoustic cavitation. The breakdown of rubber network occurs primarily around pulsating cavities due to the highest level of strain produced by high-power ultrasound. Stronger reductions of cross-link density were observed at a higher pressure, indicating an important role of pressure during ultrasonic recycling. Visible bubbles were observed during ultrasonic treatment as a proof of acoustic cavitation. Shearing effect has a significant influence on improving the efficiency of ultrasonic treatment. After the ultrasonic treatment, the cross-link densities of NR/SBR blends were lower than those of NR and SBR due to the reduced degree of unsaturation and chemical reactions. Carbon black fillers increase the probability of bond scission during ultrasonic treatment, due to the restricted mobility. The mechanical properties of ground tire rubber (GRT)/HDPE blends were improved by ultrasonic treatment and dynamic revulcanization. Ultrasonic treatment of GRT in the presence of HDPE matrix was found to give better mechanical properties due to the chemical reactions between rubber and plastic phases.
Development and Properties of Rubber Sheet using Thermoplastic Elastomer
Chun, Seung-Han ; Han, Min-Hyeon ; Mun, Il-Sik ;
Elastomers and Composites, volume 38, issue 2, 2003, Pages 122~127
Compounding, using such thermoplastic elastomer as styrene-ethylene-butadiene-styrene (SEBS) blended with polypropylene(PP), oil, and other ingredients, was studied to develop a new material with excellent impact resistance and resilience for the replacement of environmentally toxic PVC sheet. Hardness decreased linearly with oil content in the SEBS/oil blend, and the tensile strength increased with PP content whereas elongation showed no effects over 50 phr of PP in SEBS/oil/PP blend. In the practical SEBS composition, proposed to replace the PVC sheet material, tensile and tear strength, as well as hardness, increased proportionally with PP content, while melt index decreased.
A Study on Recycling Technology of Waste Tire Powder by Particle Size Distribution Analysis
Hwang, Sung-Hyuk ; Jung, Jae-Hum ; Pack, So-Yoon ; Kim, Jin-Kuk ;
Elastomers and Composites, volume 38, issue 2, 2003, Pages 128~138
It goes to be serious with environmental pollution because of great number of waste tires scrapped each you. That is why there are lots of studies for efficient recycle. We tried to reduce particle size of the waste tire powder using a new technology of self-designed grinding machine (SDGM) and ultrasonic treatment. The purpose of this study is to improve the physical properties of reduced waste tire powder. We investigated the fine powder by particle size distribution(PSD) analysis. And also we examined the physical and mechanical properties and cross-link density at various particle sire. Also we carried out morphological studies after making the products by SEM.
Filler-Elastomer Interactions. 10. Ozone Treatment on Interfacial Adhesion of Carbon Blacks/NBR Compounds
Cho, Ki-Sook ; Zaborski, M. ; Slusarski, L. ; Park, Soo-Jin ;
Elastomers and Composites, volume 38, issue 2, 2003, Pages 139~146
In this work, the influence of ozone treatment on surface properties of carbon black is investigated in terms of X-ray photoelectron spectroscopy (XPS) and contact angles. And their mechanical interfacial properties of the carbon black/acrylonitrile butadiene rubber (NBR) compounds are studied by the crosslink density and composite tearing energy (
). As a result, it is found that the increasing of the ozone concentration leads to an increase of the introduction rate of oxygen-containing functional groups onto carbon black surfaces and to an increase of the surface free energy, resulting in improving both crosslink density and tearing energy (
) of the compounds. The results can be explained by the fact that the oxygen-containing functional groups of carbon black surfaces make an increase of the degree of adhesion at interfaces between carbon blacks and rubber matrix.
Preparation of Fullerene Oxides by Fullerenes[
] with Several Oxidants under Ultrasonic Condition
Kown, Sock-Chan ; Jeong, Hong-Seok ; Ko, Weon-Bae ;
Elastomers and Composites, volume 38, issue 2, 2003, Pages 147~156
Synthesis of fullerene oxides by fullerenes [
] and several oxidants such as benzoylperoxide, trichloroisocyanuric acid, methyltrioxorhenium(VII), iodosobenzene, phosphorous pentoxide take place under ultrasonic condition at room temperature. The MALDI-TOF MS,UV-visible spectra and HPLC analysis confirmed that the products of fullerenes oxidation are [
or n=1) and [
or n=1). As compared with the reactivity of epoxidation of fullerenes [
], the reaction rate of
was lower than that of
under same reaction condition.
A Study on Existing Rubber Elasticity Theories for Stress-Strain Behavior of Rubber-like Networks
Meissner, B. ;
Elastomers and Composites, volume 38, issue 2, 2003, Pages 157~166
The Edwards-Vilgis slip-link theory and the Kaliske-Heinrich extended tube theory were tested experimentally using published experimental data on networks of natural and isoprene rubber and on polysiloxane networks. All parameters were adjusted to achieve an optimum fit. The data description obtained with the EV theory is not satisfactory and the parameter values tend to lie outside their reasonably expected range. But for the region of low strains, the Kaliske-Heinrich theory offers a satisfactorily accurate data description which is able to serve for practical purposes. Its crosslink term, however, is based on approximations which lead to a questionable prediction and values determined for the exponent in the entanglement term lie outside the range expected by the KH model. Thus, the title question cannot be given a positive answer. Conclusions published earlier that the trapped entanglements contribute both to the crosslink and constraint (entanglement) term are supported by the present data analysis. Experimental equibiaxial data on hydrocarbon networks do not show any maximum on their stretch ratio dependence, contrary to the predictions of molecular theories. The stretch ratio dependences of relative reduced stresses do not sensitively reflect differences in the chemical nature of the chain backbone (hydrocarbon vs. siloxane) and in the crosslinking method (end-linking vs. random crosslinking).
Dynamically Vulcanized PP/EPDM Blends:Effects of Different Types of Peroxides on the Properties
Naskar, K. ; Noordermeer, J.W.M. ;
Elastomers and Composites, volume 38, issue 2, 2003, Pages 167~174
Thermoplastic vulcanizates (TPV) or dynamic vulcanizates are thermoplastic elastomers produced by simultaneous mixing and crosslinking of a rubber and a thermoplastic. The objective of the present work is to investigate the effects of different types of peroxides as curing agents on the properties of PP/EPDM TPVs. The mechanical properties change significantly with the chemical nature of the peroxides and the extent of crosslinking at a fixed PP/EPDM blend ratio. The tensile strength of the TPVs obtained with the various peroxides can be related to the solubility parameters of the polymers and of the peroxides. The Young's modulus of the peroxide-cured TPVs can be correlated with the delta torque values of equivalent thermoset EPDM vulcanizates, corresponding to the crosslinking efficiencies of the peroxides.
Biaxial Tensile Behaviors of Elastomeric Polymer Networks
Shinzo, Kohjiya ;
Elastomers and Composites, volume 38, issue 2, 2003, Pages 175~179
For the total description of mechanical behaviors of elastomers, it is necessary to know the so-called rheological constitutive equation i.e. the strain-energy density function (W) in case of elastomers, which necessitates biaxial tensile results of elastic body. This paper first describes the experimental results of biaxial tensile measurements on poly(siloxane) model networks. W was estimated from its differential form i.e. the
differential of W is stress. The W was found to reproduce the experimental stress-strain results, and the W estimated for silica filled poly(siloxane) networks suggest a different behavior between conventional precipitated silica and in situ formed silica. The difference suggests the different surface property of the two silicas.