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http://dx.doi.org/10.7317/pk.2013.37.3.308

Modification of Silica Nanoparticles with Bis[3-(triethoxysilylpropyl)]tetrasulfide and Their Application for SBR Nanocomposite  

Ryu, Hyun Soo (Department of Chemical Engineering, Keimyung University)
Lee, Young Seok (Department of Chemical Engineering, Keimyung University)
Lee, Jong Cheol (Jin-Yang Oil Seal Co., Ltd.)
Ha, KiRyong (Department of Chemical Engineering, Keimyung University)
Publication Information
Polymer(Korea) / v.37, no.3, 2013 , pp. 308-315 More about this Journal
Abstract
In this study, we performed surface modification of silica nanoparticles with bis[3-(triethoxysilylpropyl)]tetrasulfide (TESPT) silane coupling agent to study the effects of treatment temperature, treatment time, and amount of TESPT used on the silanization degree with Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), elemental analysis (EA) and solid state $^{13}C$ and $^{29}Si$ cross-polarization magic angle spinning (CP/MAS) nuclear magnetic resonance spectroscopy (NMR). We found peak area of isolated silanol groups at $3747cm^{-1}$ decreased, but peak area of $-CH_2$ asymmetric stretching of TESPT at $2938cm^{-1}$ increased with the amount of TESPT from FTIR measurements. We also used universal testing machine (UTM) to study mechanical properties of styrene butadiene rubber (SBR) nanocomposites with 20 phr (parts per hundred of rubber) of pristine and TESPT modified silicas, respectively. The tensile strength and 100% modulus of modified silica/SBR nanocomposite were enhanced from 5.65 to 9.38MPa, from 1.62 to 2.73 MPa, respectively, compared to those of pristine silica/SBR nanocomposite.
Keywords
silica; bis[3-(triethoxysilylpropyl)]tetrasulfide; FTIR; SBR; nanocomposite;
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