Abstract
Poly(arylene ether nitriles) (PEN) nanocomposites containing various functionalized multi-walled carbon nanotubes (MWCNTs) were prepared through solution-casting method. The as-prepared PEN nanocomoposites were investigated by parallel-plate rheometer, aiming at examining the effect of surface functionalizaion on the dispersion of MWCNTs by using viscoelastic properties. The results of linear viscoelasticy indicated that the 4-aminophenoxyphthalonitrile-grafted MWCNTs (MWCNTs-CN) presented better dispersion in PEN matrix than purified and carboxylic MWCNTs because of the corresponding composite showed the lowest rheological percolation threshold, which was further confirmed by morphological observation. Both the dispersion state and the surface functionalization of MWCNTs are very important to the rheological behaviors of PEN matrix.
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