IngentaConnect Interface tailoring of layered silicate/styrene butadiene rubber ...

Authors: Jia, Qing-Xiu¹; Wu, You-Ping²; Lu, Ming¹; He, Shao-Jian²; Wang, Yi-Qing¹; Zhang, Li-Qun³

Source: Composite Interfaces, Volume 15, Numbers 2-3, 2008 , pp. 193-205(13)

Abstract:

To improve the interfacial interaction in clay/SBR nanocomposites prepared by latex compounding method, a novel clay modification for the nanocomposites was introduced before latex compounding with SBR using three kinds of organic modifiers, namely, hexadecyl trimethyl ammonium bromide (C16), bis(hexadecyl) dimethyl ammonium bromide (DC16) and 3-aminopropyl triethoxy silane (KH550). On the other hand, bis(triethoxysilylpropyl)tetrasulfide (Si69) was added into the KH550 modified clay/SBR nanocomposite during later mechanical blending, and was designed to interact with both KH550 and rubber and thus improve the interface. Structure changes of the nanocomposites were followed by study of X-ray diffraction, transmission electron microscopy and rubber process analyzer. Dynamic mechanical analysis and tensile tests were carried out to obtain information about the mechanical properties of the nanocomposites. The results revealed that, with the organic modification, clay was dispersed finely in the rubber matrix with part rubber-intercalated or part modifier-intercalated structure. Compared with the unmodified nanocomposite, the tensile strength, the stress at 300% strain, and the tear strength of modified SBR-clay nanocomposites were significantly improved. Moreover, the type of modifiers and strength of interfacial interaction determined the properties of the nanocomposites. The incorporation of KH550 and Si69 brought the best modification effect among all the modification methods.

Keywords: LATEX COMPOUNDING METHOD; RUBBER; CLAY; NANOCOMPOSITES; MODIFICATION

Document Type: Research article

Affiliations: 1: The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing 100029, China 2: The Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China 3: The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing 100029, China; The Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China

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Interface tailoring of layered silicate/styrene butadiene rubber nanocomposites