Kinetics and Mechanical Studies of Melaminium bis(trichloroacetate) dihydrate

Abstract

The thermal decomposition kinetics of melaminium bis(trichloroacetate) dihydrate (MTCA) has been studied by thermogravimetry and derivative thermogravimetry techniques using non-isothermal experiments at three different heating rates 10, 15, and 20Non-isothermal studies of MTCA revealed that the decomposition occurs in three stages involving dehydration and decomposition. The apparent activation energy (Ea) and the pre-exponential factor (ln A) of each stage of thermal decomposition at various linear heating rates are calculated using FlynnWall, Friedman, Kissinger, and KimPark method. A signicant variation of eective activation energy (Ea) with conversion (α) indicates that the process is kinetically complex. The linear relationship between the A and Ea values is well established (compensation eect). Isothermal kinetics of thermal decomposition of MTCA was found to obey AvramiErofeev's (A4) and power law (P3) equations. In addition to the above, mechanical properties have been estimated by Vicker's microhardness test for the grown crystal.

Thermal Decomposition Behaviour of Bis(4-Nitrophenol)-2,4,6-Triamino-1,3,5-Triazine Monohydrate

“…Many researchers reported the kinetic behavior of melamine as well as p-nitrophenol molecules [6][7][8]. Several researchers have already studied the thermal behavior of melamine and its salts [9][10][11][12][13][14][15][16]. The decomposition behavior of melamine phosphate, melamine cyanurate and melamine-formaldehyde resins are reported by many authors [17][18][19][20].…”

“…Thermal decomposition kinetics as well as thermal stability of polymers and its composites can be studied by either single heating rate program like Coats-Redfern, Freeman-Caroll, Chang or multiple heating rate programs like Friedman, Flynn-Wall, Kissinger and Kim-Park [22][23][24]. Kanagathara et al [25,26] reported the structural, optical, mechanical, dielectric * corresponding author; e-mail: anbu24663@yahoo.co.in and thermal studies of an organic-organic melamine salt (BNPM). This is for the first time, we report the nonisothermal decomposition behavior of the BNPM organic salt by different isoconversional multiple heating methods; since this method has no assumption about the reaction order in the calculation of activation energy, also yields less error than the single heating rate method, the Flynn-Wall, Friedman, Kissinger and Kim-Park.…”