Abstract
Kinetics of the reaction between castor oil based ester polyol (CEP) and poly(methylene di phenyl isocyanate) (pMDI) was studied adopting differential scanning calorimetry (DSC). DSC scans were recorded at various heating rates, viz.: 5, 10, 15 and 20 K.min−1. Hydroxyl and isocyanato compounds were taken at stoichiometric ratio [ Both single heating rate methods (Coats-Redfern, Chatterjee-Conrad) and multiple heating rate based iso-conversional methods (Ozawa, Freidman and Kissinger) were adopted to calculate the kinetic parameters. DSC thermograms consist of two exothermic peaks at temperatures 343 and 393 K, for all heating rates. Kinetic parameters were calculated using input parameters deduced from DSC thermogram. The reaction was assumed to be second order and the corresponding second order equations were applied for evaluating the kinetic parameters.
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