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

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 and cross-polarization magic angle spinning (CP/MAS) nuclear magnetic resonance spectroscopy (NMR). We found peak area of isolated silanol groups at decreased, but peak area of asymmetric stretching of TESPT at 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.

[1]  J. Landoulsi,et al.  Silane layers on silicon surfaces: mechanism of interaction, stability, and influence on protein adsorption. , 2012, Langmuir : the ACS journal of surfaces and colloids.

[2]  C. H. Thuc,et al.  Synthesis and characterization of poly(methyl methacrylate)-grafted silica microparticles , 2008 .

[3]  S. Horiuchi,et al.  Locating a silane coupling agent in silica-filled rubber composites by EFTEM. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[4]  M. López-Manchado,et al.  Characterization of the reactivity of a silica derived from acid activation of sepiolite with silane by 29Si and 13C solid-state NMR. , 2006, Journal of colloid and interface science.

[5]  G. Busca,et al.  A fourier transform infrared (FTIR) study of the reaction of triethoxysilane (TES) and bis[3-triethoxysilylpropyl]tetrasulfane (TESPT) with the surface of amorphous silica , 2004 .

[6]  P. Innocenzi,et al.  A Comparative FTIR study of thermal and photo-polymerization processes in hybrid sol-gel films , 2004 .

[7]  Soojin Park,et al.  Filler-elastomer interactions: influence of silane coupling agent on crosslink density and thermal stability of silica/rubber composites. , 2003, Journal of colloid and interface science.

[8]  J. Lannutti,et al.  Solid-state NMR evaluation of the silane structure on nanoporous silica fillers , 2001 .

[9]  Abraham Nudelman,et al.  NMR Chemical Shifts of Common Laboratory Solvents as Trace Impurities. , 1997, The Journal of organic chemistry.

[10]  Christian Roy,et al.  The vacuum pyrolysis of used tires , 1995 .

[11]  T. Bein,et al.  Surface reactions on thin layers of silane coupling agents , 1993 .

[12]  Sung‐Seen Choi,et al.  Influence of Coupling Agent on Properties of Carbon Black-Reinforced SBR and NR/SBR Vulcanizates , 2007 .

[13]  W. Ahn,et al.  Synthesis, characterization, and applications of organic-inorganic hybrid mesoporous silica , 2004 .

[14]  Seung Goo Lee,et al.  Effect of filler–filler interaction on rheological behaviour of natural rubber compounds filled with both carbon black and silica , 2003 .

[15]  É. Duguet,et al.  PMMA-based composite materials with reactive ceramic fillers. Part1.—Chemical modification and characterisation of ceramicparticles , 1997 .