Development of core-shell structure aided by SiC-coated MWNT in ABS/LCP blend

Agglomeration is an issue of major concern for unmodified multi-walled carbon nanotubes (MWNTs)-aided polymeric composites. To overcome the above-mentioned problem, multi-walled carbon nanotubes (MWNTs) are modified by polycarbosilane (PCS)-derived Silicone carbide (SiC). Acrylonitrile Butadiene Styrene (ABS)/Liquid Crystalline polymer (LCP)/MWCNT nanocomposites are prepared through melt blending in a twin screw extruder. X-Ray Diffraction (XRD) studies authenticate the creation of beta-SiC particles. Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM) studies reveal the formation of core-shell morphology involving MWNT as the core and SiC-coated MWNT as the shell. The degree of dispersion of MWNT is far better when it has been coated with SiC. As viewed from Thermo-gravimetric analysis (TGA), the thermal stability is substantially increased in SiC-aided nanocomposite in comparison to ABS/LCP/unmodified CNT blend. Glass transition temperature as well as mechanical properties are improved significantly (in the presence of SiC-coated MWNT) as a result of homogeneous dispersion exhibited by MWNT. Copyright (C) 2009 John Wiley & Sons, Ltd.