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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 47, Issue 4 - Dec 2012
Volume 47, Issue 3 - Sep 2012
Volume 47, Issue 2 - Jun 2012
Volume 47, Issue 1 - Mar 2012
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Chemical Recycling Technology from Polyester Wastes
Han, Myung-Wan ; Kang, Kyung-Suk ; Song, Jae-Kyung ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 96~103
DOI : 10.7473/EC.2012.47.2.96
This paper reviews recent technologies for recycling poly (ethylene terephthalate) wastes. Wide application and non-biodegradability of the PET creates huge amounts of waste and disposal, leading to an environmental problem and economic loss. Chemical recycling can be a promising technology to deal with these problems by converting the waste into useful feedstock material for polyester production. Chemical recycling of polyethylene terephthalate are processes where the PET polymer chain is destructed by the impact of glycol (MEG) causing glycolysis, methanol causing methanolysis or water causing hydrolysis. After intensive purification polyester oligomers or the monomers MEG, dimethyl telephthalate (DMT) or purified terephthalic acid (PTA) are received which are re-used to produce polyester products.
Recycling of Polyurethane Scraps
Kim, Han-Na ; Lee, Dai-Soo ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 104~110
DOI : 10.7473/EC.2012.47.2.104
Depending on the states of polyurethane scraps generated in the production sites of polyurethane or recycling center of polyurethane scraps, appropriate recycling technologies can be employed for the recycling of resources. In this study, recycling technologies for the polyurethane scraps were classified into physical recycling, chemical recycling, and energy recycling and reports in the literatures were discussed.
Recycling Technology of Crosslinked-Polymers Using Supercritical Fluid
Koo, Chong-Min ; Yu, Si-Won ; Baek, Bum-Ki ; Cho, Hang-Kyu ; Lee, Youn-Woo ; Hong, Soon-Man ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 111~120
DOI : 10.7473/EC.2012.47.2.111
Industrial wastes of crosslinked polymers have been burned or disposed of in landfills because there is no recycling technology due to their insoluble and infusible network chain structure. However, recycling of cross-linked polymers has been taken a growing attention because of issues of environmental pollution and of resources conservation. In this paper, uprising recycling technologies of crosslinked polymers using supercritical fluid are reviewed.
Development of Rubber Composite Materials Using Waste EPDM
Park, Dong-Kyu ; Hong, Yeo-Joo ; Jeong, Keuk-Min ; Kim, Jin-Kuk ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 121~128
DOI : 10.7473/EC.2012.47.2.121
Waste EPDM(W-EPDM) collected from the automotive weather strip and the gasket of a laundry machine has not been effectively recycled. Using this W-EPDM powder and other ingredients, i.e., binder(polyolefin resin, polyolefin elastomer, etc.), filler and additives, various economic rubber composites were made by extrusion. In advance of main experiments, the effects of ultrasonic treatment of W-EPDM on the property of rubber composites, comparison in the property of the composites of W-EPDM with those of virgin and devulcanized EPDM, and waste tire rubber were investigated. Also, the properties of the rubber composites extruded with a 12-screw extruder were compared with those extruded with twin-screw extruder. Various W-EPDM composites for synthetic turf filler and car mat were extruded and injection molded, and 3 main properties of tensile strength, elongation and hardness were investigated to develop economical and proper recipes of the rubber composites.
Investigation on Material Flow Diagram for PVC(poly vinyl Chloride) Profile Based Production, Generation, Recycling and Treatment
Phae, Chae-Gun ; Jung, Oh-Jin ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 129~140
DOI : 10.7473/EC.2012.47.2.129
The objective of this study was to estimate the practical recycling rate of plastic products, so that the study was conducted to build material flow diagram for PVC profile. For this objective, product generation, waste generation and recycling status were investigated. Using collected and analyzed status data, analysis of material flow by product and building material flow diagram were conducted. As result of estimating the recycling rate by product, The sum of domestic demand was 525,448 ton and waste generation was 105,853ton in PVC flooring and profile. The sum of generation of recycling product and raw material was investigated to be 76,004ton(14.46%), which is higher compared to recycling obligation(8.5%) in 2009. To build the material flow diagram in the years(5~20years) ahead, prediction of future demand was based on the assumption that there will be no difference in annual generation of current and future. As the recycling rate of flooring and profile increases, it is estimated to reach 20% in 2013 according to the material flow diagram.
Study on the Characteristics of the Absorbency Silicone by Super Absorbent Polymers
Cha, Gook-Chan ; Song, Jeom-Sik ; Lee, Suk-Min ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 141~147
DOI : 10.7473/EC.2012.47.2.141
Silicone resin has no water-absorbing function because it is a strong hydrophobic polymer. However, addition of super absorbent polymer gives much better absorbency than that of conventional silicone resin. In this study, we developed novel silicone materials with water-absorbing function by choosing three types of amorphous acrylic super absorbent polymers with different particle sizes, determining the mixing ratio of the three polymers and applying the mixtures into two-component type silicone material for medical purpose. The change in the mechanical properties such as tensile strength, tear strength, compressive strength and hardness was investigated by varying the particle size and content ratio of the added super absorbent polymers while preparing the silicone resins. The absorbency of the silicone resins was measured over time. Additionally, the particle shape of the super absorbent polymers as well as the distribution within the silicone resin was observed using an optical microscope.
Thermal Aging Behaviors of Weather Resistant Rubber Composites of EPDM, IIR, and BIIR
Choi, Sung-Seen ; Kim, Jong-Chul ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 148~155
DOI : 10.7473/EC.2012.47.2.148
EPDM, IIR, and BIIR composites were thermally aged and the crosslink density changes were investigated. Crosslink densities of the EPDM composite increased with increasing the aging time and temperature, whereas those of IIR and BIIR composites for long-term aging at high temperatures tended to decrease. Activation energies for the crosslink density changes of the EPDM composite were higher than those of the BIIR one. The experimental results were explained with the number of allylic hydrogens, activation of the zinc complex, the steric hindrance effect, and oxidation of rubber chain.
Influence of Aging Media and Filler System on Recovery Behaviors of Natural Rubber Composites
Choi, Sung-Seen ; Kim, Ok-Bae ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 156~161
DOI : 10.7473/EC.2012.47.2.156
Difference in recovery behaviors from the circular deformation of natural rubber (NR) composites aged in air and distilled water, respectively were investigated. Recoveries of the samples aged in air were larger than those of the samples aged in distilled water. Recovery rates of the samples reinforced with filler were faster than those of the unreinforced ones. Recovery rates of the carbon black-filled samples were faster than those of the silica-filled ones. Difference in the recovery behaviors according to the aging media can be explained by the crosslinking density changes and the annealing effect.
Modification and Properties of Polyolefin with Maleic Anhydride as a Functional Monomer
Mo, Jong-Hun ; Lee, Jae-Seok ; Choi, Im-Cheol ; Lee, Won-Kee ; Park, Sang-Bo ; Min, Seong-Kee ; Park, Chan-Young ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 162~167
DOI : 10.7473/EC.2012.47.2.162
Surface modification of macromolecules renders a progressive and favorable method to enhance the properties of polymeric materials and improves conductivity, wettability, stability, adhesion, antibacterial properties, etc. of polymeric surfaces without deterioration of the polymer bulk properties. Polyolefins such as polyethylene and polypropylene were grafted with maleic anhydride(MAH) as a functional monomer in solution. Evidence for grafting was shown with FTIR measurement. The grafting ratio was determined from chemical titration. The higher MAH loading, the lower contact angle(
) was obtained. With the increasing content of MAH, melting temperature(
) of maleic anhydride grafted polymer decreased while decomposition temperature(
) of maleic anhydride grafted polymer increased.
Synthesis of Magnetic Polystyrene-Polyimide Core-Shell Microsphere
Ahn, Byung-Hyun ;
Elastomers and Composites, volume 47, issue 2, 2012, Pages 168~173
DOI : 10.7473/EC.2012.47.2.168
Polystyrene-polyimide core-shell microsphere was prepared by dispersion polymerization using poly(amic acid) as the stabilizer. Iron oxide was formed at the microsphere by thermal decomposition of iron pentacarbonyl impregnated in the microsphere. The magnetic polystyrene-polyimide microsphere was monodisperse and the size was about 500 nm. The magnetic polystyrene-polyimide microsphere had 40% of iron oxide, which was identified as
by X-ray diffraction.