Thermally Stimulated Relaxations And Electrical Conductivity Studies Of Polyacrylamide– Polyacrylic Acid Blends.

[摘要] Thermally stimulated relaxations (TSR), employing thermally stimulated luminescence (TSL) andconductivity (TSC) as experimental techniques have been studied in Polyacrylamide-Polyacrylic acid(PAAm-PAA) blends; in the temperature range of 300-490 K. Measurements of electrical conductivity (σ)as a function of temperature; of the blends have been made. These studies are undertaken mainly (i) toestablish the compatibility of the constituent polymers to form a homogeneous blend with a single phaseor heterogeneous to form multiphase component system (ii) the compositional dependence of thepolymer compatibility and (iii) to study the mechanism of electrical charge transport phenomena inrelation to the macromolecular relaxation and transitions in polymer blends. The appearance of TSL/TSCglow curves is attributed to the detrapping of charge carriers facilitated by the primary and secondaryrelaxations; the transition temperatures, at which there are changes in slopes for log σ vs 1/T plotsindicate the on-set of various relaxations of polymer blends. Experimental results obtained by TSL/TSCare correlated and analyzed to establish the compatibility of the constituent polymers in the blend, forvarious compositions.

[学科分类] 工程和技术（综合）

[关键词] Thermally stimulated relaxations (TSR);Thermally stimulated luminescence (TSL);Thermally stimulated conductivity (TSC);Polyacrylamide (PAAm);Polyacrylic acid (PAA);electrical conductivity.