Zobrazeno 1 - 3
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pro vyhledávání: '"Hossam B. Alaa"'
Publikováno v:
Polymer Composites. 41:1405-1417
Publikováno v:
Egyptian Journal of Physics.
Positron annihilation lifetime (PAL) as a function of temperatures were measured to determine the thermal expansion coefficient () of the ortho-positronium (o-Ps) hole volume for poly(vinyl alcohol), PVA. On the other hand, the thermal expansio
Publikováno v:
Materials Science Forum. :328-330
Positron annihilation lifetime and Doppler broadening of annihilation radiation studies of pure and doped polyvinyl chloride (PVC) with Al2O3 reflect the effect of concentration on free volume. Therefore, variations of the relative fractional free vo