Biography
Ehsan Gomaa department of Physics, Faculty of Science, Ain Shams University, Abbassia, 11566, Cario, Egypt. Worked on Positron Annihilation Lifetime (PAL) spectroscopy has been used to investigate the effect of different concentrations of graphite and copper nano-particles in polyvinylchloride (PVC)/ butadiene-acrylonitrile copolymer (NBR) blends on free volume properties of PVC/NBR nano composites.