Abstract
High performance MWCNT-reinforced polyimide nanocomposites were prepared through in situ polymerization route. 2,6-Diaminoanthraquinone (2,6-DAAQ) was selected to serve as both a diamine comonomer, and a noncovalent dispersant of MWCNTs through π–π interaction. The good dispersion of MWCNTs in both solution and polymer matrix, and high compatibility derived from the structural similarity have been proved to be particularly advantageous for the interfacial adhesion and load transfer from the polymer matrix to MWCNTs. The nanocomposites with 0.50–0.75wt% MWCNTs had the most excellent thermal stability, thermomechanical and tensile properties, and the electrical conductivity also achieved a sharp increase at such low content. The load transfer efficiency was calculated based on both theoretical model and microscopical size measurement, and the results were rather reasonable within accepted error range.
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