PREPARATION AND CHARACTERIZATION OF PETI-330/MULTI-WALLED CARBON NANOTUBE COMPOSITES

摘要

As part of an ongoing effort to incorporate multifunctionality into advanced composites,rnblends of PETI-330 and multi-walled carbon nanotubes (MWCNTs) were prepared,rncharacterized and fabricated into moldings. The PETI-330/MWCNT mixtures were preparedrnat concentrations ranging from 3 to 25 weight percent by dry mixing the components in a ballrnmill. The resulting powders were characterized for degree of mixing, thermal and rheologicalrnproperties. Based on the characterization results, PETI-330/MWCNT samples were scaled uprnto ～300 g and used to fabricate moldings 10.2 cm × 15.2 cm × 0.32 cm thick. The moldingsrnwere fabricated by injecting the mixtures at 260-280℃ into a stainless steel tool followed by curing for 1 h at 371℃. The tool was designed to impart shear during the injection process in an attempt to achieve some alignment of the MWCNTs in the flow direction. Good quality moldings were obtained that were subsequently characterized for thermal, mechanical and electrical properties. The degree of dispersion and alignment of the MWCNTs were investigated using high-resolution scanning electron microscopy and Raman spectroscopy. The preparation and preliminary characterization of PETI-330/MWCNT composites will berndiscussed.