Preparation and properties of octadecylamine modified graphene oxide/styrene-butadiene rubber composites through an improved melt compounding method

摘要

Octadecylamine modified graphene oxide/styrene-butadiene rubber (GO-ODA/SBR) composites are prepared by a novel and environmental-friendly method called "Improved melt compounding". A GO-ODA/ethanol paste mixture is prepared firstly, and then blended with SBR by melt compounding. GO-ODA sheets are uniformly dispersed in SBR as confirmed by scanning electron microscope, transmission electron microscopy, and X-ray diffraction. The interfacial interaction between GO-ODA and SBR is weaker than that between GO and SBR, which is proved by equilibrium swelling test and dynamic mechanical analysis. GO-ODA/SBR show more pronounced "Payne effect" than GO/SBR composites, indicating enhanced filler networks resulted from the modification of GO with ODA. GO-ODA/SBR composite has higher tensile strength and elongation at break than SBR and GO/SBR composite. The tensile strength and elongation at break for the composite with 5 parts GO-ODA per hundred parts of rubber increase by 208% and 172% versus neat SBR, respectively. (C) 2015 Wiley Periodicals, Inc.