Comparative study of kinetic reaction of 4,4′-Methylenebis (2-m ethel cyclo hexyl amine) with dimeric fatty acid c₃6 by use of a catalyst of phosphoric acid and dioxide manganese

Kinetic study was carried out on the reaction between 4,4′-Methylenebis (2-methylcyclohexylamine and dimeric fatty acid C₃6 in molten state by use a catalyst of phosphoric acid and dioxide manganese the reaction was performed at 150 ^oC, and followed by determining the acid value of the product the polyamidation reaction was found to be of overall a second order until equilibrium state moreover the reaction was faster in the presence of the dioxide manganese polyamidation reaction was automatic where the value of free energy was negative the kinetics of thermal degradation was studied by use of thermogravimetric analysis (TGA) and was found to be of overall a second order and was followed by determining the thermodynamic constants of the thermal degradation reaction melting points and transitional glass in the presence of the catalyst were determined by use of differential calorimetry scanning (DSC) and was found to be close the degree of polymerization number average molecular weight and weight average molecular weight have been calculated during different times we noticed that the relationship between degree of polymerization and number average molecular weight, weight average molecular weight with time is linear until equilibrium state the prepared polyamide involve crystallization and amorphous area this was shown by XRD spectra. (author)