Poly(hexamethylene terephthalate) (PHT)/carbon nanotubes (CNT)
nanocomposites containing 1% and 3% (w/w) of filler were prepared by two
procedures: in situ ring-opening polymerization of hexamethylene terephthalate cyclic
oligomers in the presence of CNT and melt blending of PHT/CNT mixtures. Arc
discharge multiwalled carbon nanotubes, both pristine (MWCNT) and hydroxyl
functionalized (MWCNT-OH), were used. The objective was to evaluate the effect of
preparation procedure, nanotube sidewall functionalization and amount of nanotube
loaded on properties of PHT. All nanocomposites showed an efficient distribution of
the carbon nanotubes within the PHT matrix but interfacial adhesion and reinforcement
effect was dependent on both functionalization and nanotubes loading. Significant
differences in thermal stability and mechanical properties ascribable to functionalization
and processing were observed among the prepared nanocomposites. All the prepared
nanocomposites showed enhanced crystallizability due to CNT nucleating effects
although changes in melting and glass transition temperatures were not significant.
CitationGonzález, N. [et al.]. Synthesis and properties of poly(hexamethylene terephthalate)/multiwall carbon nanotubes nanocomposites. "Composites science and technology", 01 Maig 2010, vol. 70, núm. 5, p. 789-796.
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