Ali Habibi - Chem. Eng. Dept., Tarbiat Modarres University,Tehran, Iran، Research Institute of Petroleum Industry (RIPI), Tehran, Iran
Ebrahim Vasheghani-Farahani - Chem. Eng. Dept., Tarbiat Modarres University,Tehran, Iran
Sadaghiani - Research Institute of Petroleum Industry (RIPI), Tehran, Iran

The decomposition kinetics of 2, 2 azoisobutyronitrile (AIBN) as an initiator for polymerization systems was studied using thermal analysis techniques. The kinetic and thermodynamic parameters of the reaction were determined using TG/DTG and DSC data. Thermal analysis experiments were performed in both isothermal and dynamic modes. The model-free and model-fitting kinetic approaches have been applied to TG/DTG and DSC data for retrieval of kinetic parameters. The enthalpy of reaction, decomposition rate constant, kd; and Arrhenius parameters were obtained through an efficient optimization program from these models. The model-free isoconversional method yields dependencies of the activation energy on conversion. A computer program, which enables regression analysis, estimation and optimization of kinetic and thermodynamic parameters from thermoanalysis data, is presented. This program use from the Freeman-Caroll, Horowitz Metzger, Coats-Redfern, Liu et. al., Doyle and isoconversional methods. Also predictor corrector algorithm coupled with screen graphics were used to solve the differential equations representing kinetic models of thermoanalysis data.

Azoisobutyronitrile (AIBN), Kinetics, Thermogravimetry, Differential Scanning Calorimetry