Authors : Sanjiokumar S. Rahangdale, Narayan C. Das, Kiran S. Vajpai and Wasudeo B. Gurnule
Page Nos : 194-204
Description :
The copolymer HMBPDANF-II has been synthesized by condensation of 2-hydroxy, 4-methoxybenzophenone and 1, 5-
diaminonaphthalene with formaldehyde in the presence of hydrochloric acid as a catalyst in the 2: 1: 3 molar proportion
of reactants. The structure of copolymer has been characterized by elemental analysis, UV-Visible, FT-IR and 1H-NMR
spectroscopy. The morphology of copolymer has been studied by scanning electron microscopy (SEM). The thermal
decomposition behavior of HMBPDANF-II copolymer has been carried out by using TGA in static nitrogen atmosphere at
a heating rate of 10 0C/min. Sharp-Wentworth and Freeman-Carroll methods have been applied to calculate the thermal
activation energy (Ea), entropy change (ΔS), apparent entropy change (S*), free energy change (ΔF) and frequency factor
(Z). The order of reaction (n) has been found to be 0.95.
