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A cellulose acetate matrix was irradiated in the dose range 0-250 kGy by γ radiation from a 60 Co source under an argon atmosphere; positron lifetime experiments were performed under the same atmosphere at room temperature. The results reveal a dominant intermediate component τ 2 ( 430 ps) attributable to a crystalline macrocellulosic domain. Important changes are shown by the...
Electrochemical synthesis of polypyrrole films containing vinyl sulphonate and styrene sulphonate dopants were carried out in a three-electrode one-compartment cell employing galvanostatic conditions at constant charge density. Various parameters like current density, dopant concentration, pH and temperature during synthesis were varied for both the dopant anions. Room temperature conductivity for...
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