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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Elastomers and Composites
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Journal DOI :
The Rubber Society of Korea
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Volume & Issues
Volume 45, Issue 4 - Dec 2010
Volume 45, Issue 3 - Sep 2010
Volume 45, Issue 2 - Jun 2010
Volume 45, Issue 1 - Mar 2010
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Reactions and Properties of Fullerene (
Lim, Choong-Sun ; Hong, Seong-Kyu ; Ko, Weon-Bae ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 74~79
In this review, the properties of buckminsterfullerene and its organic and polymeric reactions were focused. In addition, polymer blending with
will be briefly introduced. As soon as
was discovered, chemists put their efforts to explore its reactivity with other compounds. The knowledge of the organic reactions with
was extended to construct different types of fullerene polymers such as side chain fullerene polymers, main chain fullerene polymers, star shaped fullerene polymers, and dendritic fullerene polymers.
The Functionalization and Preparation Methods of Carbon Nanotube-Polymer Composites: A Review
Oh, Won-Chun ; Ko, Weon-Bae ; Zhang, Feng-Jun ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 80~86
Carbon nanotubes (CNTs) exhibit excellent mechanical, electrical, and magnetic properties as well as nanometer scale diameter and high aspect ratio, which make them an ideal reinforcing agent for high strength polymer composites. The functionalized CNTs are believed to be very promising in the fields such as preparation of functional and composite materials. CNT-Polymer composites are expected to have good processability characteristics of the polymer and excellent functional properties of the CNTs. However, since CNTs usually form stabilized bundles due to Van der Waals interactions, are extremely difficult to disperse and align in a polymer matrix. The biggest issues in the preparation of CNT-reinforced composites reside in efficient dispersion of CNTs into a polymer matrix, and the alignment and control of the CNTs in the matrix. There are several methods for the dispersion of nanotubes in the polymer matrix such as solution mixing, bulk mixing, melt mixing, in-situ polymerization and chemical functionalization of the carbon nanotubes, etc. These methods and preparation of high performance CNT-polymer composites are described in this review.
Preparation and Characterization of Fire-Resistant Silicone Polymer Composites Containing Inorganic Flame Retardants
Yoon, Chang-Rok ; Lee, Jong-Hyeok ; Bang, Dae-Suk ; Won, Jong-Pil ; Jang, Il-Young ; Park, Woo-Young ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 87~93
The fire resistive materials are used to resist from fire accidents in the building. In this study silicone rubber/inorganic flame retardant composites were prepared by mechanical stirring method, using aluminium trihydroxide(ATH,
) and magnesium dihydroxide(MDH,
) as synergistic fire-resistant additives. The thermal properties of the fire resistant composites were characterized by thermogravimetric analysis(TGA). In addition, rheological properties were observed by rheometer and fire-resistant properties were tested by gas torch. Through this study, we realized that the silicone rubber containing ATH, MDH increased the performance of fire-resistance.
Treatment of Whitening of a Car TPE Component
Choi, Sung-Seen ; Chung, Hye-Seung ; Joo, Yong-Tae ; Min, Byung-Kwon ; Lee, Seong-Hoon ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 94~99
340 nm UV radiation of
irradiated a thermoplastic elastomer (TPE) specimen used for interior and exterior materials of a car. After the UV irradiation, the black sample surface was changed to gray. Materials on the aged sample were collected and analyzed using GC/MS, but significant materials were not found. Lots of small cracks were found on the aged specimen surface. Whitening phenomenon of the aged sample disappeared by brushing or searing with a fire on the aged surface. After brushing or searing with a fire, small cracks on the surface vanished. Samples before and after the aging, and the treated samples with brush or fire were analyzed using image analyzer, SEM, EDX, and ATR and the results were compared. The vanished whitening phenomenon by brushing or searing was explained with filling the small cracks by polypropylene of TPE.
Appearance Contamination of EPDM Article from Water Solution
Choi, Sung-Seen ; Chung, Hye-Seung ; Joo, Yong-Tae ; Yang, Kyung-Mo ; Lee, Seong-Hoon ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 100~105
An EPDM article was aged in air, distilled water, tap water, NaCl/
solution for 7 days. The aging temperature was
. The samples aged in air and distilled water did not appear the whitening, those aged in tap water, NaCl/
solution showed the whitening. Soluble organic materials were analyzed using GC/MS to identify the whitening materials, surface morphology of the aged sample surface was examined using image analyzer and SEM, and elemental analysis of the materials accumulated on the sample surface was performed using EDX. Principal reason to cause whitening might be formation of metal salt of fatty acid by reaction between metal cation and fatty acid.
Basic Study for Development of Magneto-rheological Elastomer
Chung, Kyung-Ho ; Yoon, Kyu-Seo ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 106~111
Magneto-rheological elastomers (MREs) were manufactured by incorporation of magnetic responsible powder (MRP) into natural rubber and silicone rubber. The optimum loading amounts of MRP was 30 vol.% and the natural rubber based MRE (NR-MRE) showed better mechanical property than that of silicone rubber based MRE (S-MRE). However, the modulus shift ratio caused by S-MRE, measured by Self-modified Electromagnet Applied Fast Fourier Transform Analyser (SEFFTA), was higher than that of NR-MRE. The modulus shift ratio caused by NR-MRE was 10%, while the modulus shift ratio caused by S-MRE was 35.7%. The modulus shift ratio could be improved by orienting the magnetic direction of MRP before crosslinking the MRE. The degree of orientation of MRP was analyzed using SEM.
Swelling Ratio and Mechanical Properties of SBR/organoclay Nanocomposites according to the Mixing Temperature; using 3-Aminopropyltriethoxysilane as a Modifier and the Latex Method for Manufacturing
Kim, Wook-Soo ; Park, Deuk-Joo ; Kang, Yun-Hee ; Ha, Ki-Ryong ; Kim, Won-Ho ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 112~121
In this study, styrene butadiene rubber(SBR)/organoclay nanocomposites were manufactured using the latex method with 3-aminopropyltriethoxysilane(APTES) as a modifier. The X-ray diffraction(XRD), transmission electron microscopy(TEM) images, Fourier transform infrared(FTIR) spectroscopy, swelling ratio and mechanical properties were measured in order to study the interaction between filler and rubber according to the mixing temperature in the internal mixer. In the case of SBR/APTES-MMT compounds, the dispersion of the silicates within the rubber matrix was enhanced, and thereby, the mechanical properties were improved. The characteristic bands of Si-O-C in APTES disappeared after hydrolysis reaction in the MMT-suspension solution and the peak of hydroxyl group was increased. Therefore the formation of chemical bonds between the hydroxyl group generated from APTES on the silicate surface and the ethoxy group of bis(triethoxysilylpropyl) tetrasulfide(TESPT) was possible. Consequently, the 300% modulus of SBR/APTES-MMT compounds was further improved in the case of using TESPT as a coupling agent. However, the silanization reaction between APTES and TESPT was not affected significantly according to the increase of mixing temperature in the internal mixer.
Effect of Carbon Black Concentration and Monomer Compositional Ratio on the Flow Behavior of Copoly(styrene/butyl methacrylate) Particles
Park, Moon-Soo ; Moon, Ji-Yeon ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 122~128
We measured shear viscosity of copoly(styrene(St)/butyl methacrylate(BMA)) (co-PSB) particles, with a capillary rheometer at
, prepared by suspension polymerization with hydrophobic silica as a stabilizer. co-PSB particles with the weight average molecular weights of lower than 74,800 g/mol displayed a Newtonian behavior at low shear rates. With the weight average molecular weight exceeding 136,800 g/mol, co-PSB particles showed shear thinning against shear rates and the absolute value of the slopes between shear viscosity vs. shear rate increased. When the ratio between St and BMA changed from 7/3 to 5/5 to 3/7, shear viscosity and glass transition decreased despite similar molecular weights. When the ratio was 1/9, it showed a large increase in initial shear viscosity despite reduced glass transition. Shear viscosity exhibited an increase in proportion to carbon black concentration. The effect of carbon black concentration on the shear viscosity of co-PSB composites was less pronounced compared to varying molecular weights and/or compositional ratio.
Study on PLLA Alloys with Impact Modifier and Talc
Jeong, Dong-Seok ; Nam, Byeong-Uk ; Jang, Mi-Ok ; Hong, Chae-Hwan ;
Elastomers and Composites, volume 45, issue 2, 2010, Pages 129~136
In this work, PLLA/EGMA blends were prepared by melt blending of biodegradable Poly-L-lactic acid(PLLA) with Poly(ethylene-co-glycidyl methacrylate)(EGMA) and Engage as impact modifiers by twin screw extruder. Blend compositions of PLLA/Impact modifier blends were 100/0, 75/25, 50/50, 25/75 and 0/100, respectively. Also, Talc was added to 3 PLLA rich phases on PLLA/EGMA blends. The morphology, viscoelastic/mechanical properties were characterized by FESEM, DMA, UTM and Izod impact tester. DMA and Izod impact test data showed that storage modulus at room temperature with increasing EGMA and Engage contents decreased, and impact strength increased. However, storage modulus at room temperature increased by adding talc. From FESEM image, we observed that domain phase was well dispersed into matrix. Although the tensile strength and flexural modulus were decreased with increasing the content of EGMA and Engage in them, they could be supplemented by adding talc.