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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 (Department of Chemical Engineering, Pusan National University)
Park, Deuk-Joo (Department of Chemical Engineering, Pusan National University)
Kang, Yun-Hee (Department of Chemical Engineering, Pusan National University)
Ha, Ki-Ryong (Department of Chemical Engineering, Keimyung University)
Kim, Won-Ho (Department of Chemical Engineering, Pusan National University)
Publication Information
Elastomers and Composites / v.45, no.2, 2010 , pp. 112-121 More about this Journal
Abstract
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.
Keywords
SBR latex; organoclay; $Na^+$-montmorillonite; 3-aminopropyltriethoxysilane; bis(triethoxysilylpropyl)tetrasulfide; filler-rubber interaction;
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