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Research Article Open Access
The resin SPDF has been synthesized through condensation of salicylic acid and phenylenediamine with formaldehyde via hydrochloric acid as catalyst in the ratio 1:1:2. Comprehensive thermal degradation studies of this resin have been approved to establish its thermal stability. Electrical conductivity measurements have been also conceded out to learn the semiconducting nature of the resin. The activation energy (Ea) calculated by with the Sharp-Wentworth method (15.03 kJ/mol) has been found to be in good agreement with that calculated by Freeman-Carroll (16.92 kJ/mol) method. A thermodynamic parameter such as free energy change (ΔF), entropy change (ΔS), apparent entropy change (S*) and frequency factor (Z) have also been evaluated on the basis of the statistics of Freeman–Carroll method. The order of reaction (n) is found out to be 0.98. The newly synthesized SPDF resin was found to be thermally stable and semiconducting in nature.
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Author(s): Dhanraj T Masram KiranKariya and Narayan Bhave
Resin, Condensation, Thermal stability, Decomposition, Electrical conductivity