In the last years scientific research on nanoscale materials has gained considerable success and at present some developments have efficiently entered into the automative, building and packaging commercial sector. Due to its small dimensions, high aspect ratio, inherently high stiffness and strength, considerably small specific weight, unique electrical, magnetic and thermal characteristics, probably the most promising nanomaterials are carbon nanotubes (CNT). CNT-polymer nanocomposites have found some uses in applications such as anti-static layers, chemical vapor sensors, thermal resistors and others. To ensure reliable exploitable properties of the CNT-polymer nanocomposites, a high dispersion of CNTs in the polymer matrix without agglomeration is required. In contrary, CNTs with their high van der Waals interactions, high surface area, and high aspect ratio cause the self-aggregation that disturbs the improved properties of CNT/polymer nanocomposites.

CNT modified polymer nanocomposites have been investigated in this research. Bayer Baytubes – agglomerates of multiwall CNT with low outer dimeter, narrow diameter distribution and an ultra high aspect ratio – are used as a filler (up to concentrations of 10 vol. %) for preparation of either polyvinlylacetate (PVAc) or styrene-acrylic copolymer (SAC) nanocomposites. Most important technological parameters for manufacturing of the nanocomposites by solution casting are defined. Specific attention is paid to the method of dispersing the CNT in the corresponding solvent. Physical (density) properties, calorimetric and thermo gravimetric parameters, electric (conductivity, surface and volume resistivity) properties, as well as tensile stress-strain characteristics of the PVAc/CNT and SAC/CNT nanocomposites are investigated. Some possible application examples of such nanocomposites are for electro conductive adhesives and paints.

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