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Effect of polyethylene glycol on the properties of styrene-butadiene rubber/organoclay nanocomposites filled with silica and carbon black



Polyethyene glycol (PEG) is widely used as a dispersing agent and can also be used to prevent the adsorption of ingredients on the surface of silica. From the XRD results, PEG that was used as the dispersing agent on the SBR/organoclay compound filled with silica and carbon black (CB) was intercalated between the organoclay layer. Additionally, the interactions with the PEG differed depending on whether 3-aminopropyltriethoxysilane (APTES) or N,N-dimethyldodecylamine (DDA) were used as clay modifiers. When PEG was added, the Tg of the SBR/silica/APTES-MMT compound increased through the formation of hydrogen bonds between the ether linkages of PEG and the hydroxyl groups of APTES. For the SBR/silica/DDA-MMT compound with PEG, slippage occurred between the silicate, and DDA because of the alkyl chain of DDA. The SBR/silica/APTES-MMT/CB compound with PEG exhibited the highest Tg value and the highest bound rubber content, with high modulus values at 100 and 300%. The SBR/silica/DDA-MMT/CB compound had the best properties in terms of the wet skid resistance and the rolling resistance. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011