The Study On The Modification Organic Nano-Silica And The Structure, Property Of Nanosilica-Sn-S-SBR

The research of the thesis can be divided into four parts: 1. The influence of NaSiO₃ concentration, reaction temperature, aging time, and glycol for the reaction system were studied. A preparation technology was assured. The NaSiO₃ concentration was controlled at 5%, the reaction temperature for "crystal seed" was limited at 40 ℃ and nano-SiO₂ was 80 ℃. The final pH value was limited around 7, and aging time was 1h. We found that the physical mechanical properties of the home made nano-SiO₂/SSBR were better than the market nano-SiO₂/SSBR. 2. The results showed that the silanol groups on the surface of SiO₂ reacted with the alkoxyl group of silicane coupling agents at 85⁹0℃. The peak area of hydroxyl of SiO₂ and nano-SiO₂ modified (MSiO₂) in FTIR spectrum was quantitatively determined, and so the specific content of hydroxyl on the surface of SiO₂ was obtained. By the way of observing TEM photograph the dispersion of MSiO₂ in Sn-SSBR was markedly improved. And at the same time the modulus, the tensile strength of MSiO₂/Sn-SSBR composite were increased and the tear strength, elongation of that were...