STUDIES AND RESEARCHES ON THE OBTAINING OF POLYMER/MWCNT NANOCOMPOSITE MATERIALS WITH IMPROVED ELECTRIC PROPERTIES.

Commonly, the polymers are dielectric materials. A method to improve the polymer materials electric properties is the addition of the particles with superior electric parameters into the unsaturated matrix. In this way, multiwall carbon nanotubes (MWCNT) were used, as pristine material. A new dispersion technology of the pristine MWCNT was experimented. In order to relieve physical and chemical processes that induce the improved electrical properties to polymer/MWCNT nanocomposite material, the results obtained for different MWCNT concentrations (0,10%; 0,15%; 0,20%) are comparative presented. MWCNTs optimum dispersion concentration was assessed by a rheological analysis measuring the viscosity of polymer/MWCNT nanocomposite precursor system. The nanoscale effect appeared at carbon nanotubes proximity with concentration increasing and also the technological process contribution is demonstrated by precursor viscosity variation. In this paper, a comparative study of precursor systems viscosity variation at three different concentrations and nanocomposite materials electrical conductivity is presented. The critical analysis of the obtained results demonstrates MWCNT optimum concentration of 0,175%. [ABSTRACT FROM AUTHOR]