Effect of fullerene C60 admixture in paraffin wax on the refractive index and phase transition temperatures

The paraffin wax (PW) utilized as a phase change material is promising for thermal energy storage systems. However, the application of this limited by itslow conductivity. fullerene C60 adding in PW can help to eliminate problem.Therefore, system PW/C60 studying its properties.
 results an experimental study refractive index solutions 52...54 °C melting point at ranges С60content 0...0.052 wt. %and temperatures 41…65 °С are presented study. complex character concentration dependence on isotherms studied thermodynamic systems has been registeredboth liquid and solid phases.Data effect content start finish transition presented. At 0…0.01 % decreased, 0.01…0.04 they increased more than pure 0.04 decreased again.
 obtained effects decrease increase PWcrystallizationcan be explained structural transformations caused presence. In authors' opinion, reason extreme behavior objects density fluctuations quasi-crystalline structure phases.These cause similar inthe dependencies