PLT and DBAR Investigations on MPDMAPP Doped PVA PVP Blend

Poly(vinylalcohol) (PVA) Poly(vinylpyrrolidone) (PVP) blend films, doped with chalcone derivative (1-(4-methylphenyl)-3-(4-N,N,dimethylaminophenyl)-2-propen-1-one) (MPDMAPP) from 0.025 wt% up to 1 wt% were prepared using solution casting technique. The o-Ps lifetime τ3 is found to change little, fro...

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Bibliographic Details
Published in:Journal of physics. Conference series 2015-06, Vol.618 (1), p.12030
Main Authors: Bhajantri, R F, Ravindrachary, V, Lobo, Blaise, Pujari, P K, Rathod, Sunil G, Naik, Jagadish, Hebbar, Vidyashree, H, Chandrappa
Format: Article
Language:English
Subjects:
Dopants
Parameters
Phase separation
Physics
Polyvinylpyrrolidone
Positronium
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Summary:Poly(vinylalcohol) (PVA) Poly(vinylpyrrolidone) (PVP) blend films, doped with chalcone derivative (1-(4-methylphenyl)-3-(4-N,N,dimethylaminophenyl)-2-propen-1-one) (MPDMAPP) from 0.025 wt% up to 1 wt% were prepared using solution casting technique. The o-Ps lifetime τ3 is found to change little, from 1.61 ns at 0.025 wt% dopant concentration to 1.63 ns at 0.5 wt% dopant level, but drops to 1.4 ns at 1 wt% dopant concentration, indicating the onset of phase separation. The S-parameter of DBAR was found to be linearly related to the ortho-Positronium(o-Ps) intensity I3. The S-parameter drops significantly from 0.1 wt% up to 1 wt% doping concentration. This is supported by the XRD scans.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/618/1/012030