Author/Authors :
Hasan, B. A. University of Baghdad - College of Science - Department of Physics, Iraq , Ahmad, A. H. University of Baghdad - College of Science - Department of Physics, Iraq , Hasan, S. M. University of Baghdad - College of Science - Department of Physics, Iraq
Abstract :
The influence of gamma radiation and blend ratio on the optical constants (refractive index (n). extinction coerticient (k), and rcnl imaginary parts of dielectric constants (Єl (Є2)) lor high density polyethylcne (hdpe) Polypropylene (PP) blends using the transmittance and reflectance spectra have been discussed. For unirradiated samples the results showed that (n) increases in rich PP sample while (k) declared strong dependence on blends ratio nnd revealed systematic variation. It was found that (n) increases as a result of irradiation by gamma-ray with doses (80 and 240) kGy indicating that polymer chain crosslinking is the dominate phenomena . while lor irradiation with dose 160 kGy (n) is found to decrease indicating that polymer degradation is the dominate phenomena (chain scission).
