Thermal and Kinetic Behaviour of Pongamia Glabra Oil Fatty Amide

Abstract

N,N-bis(2-hydroxyl ethyl) Pongamia glabra oil fatty amide (HEPA) was synthesised by the aminolysis of pongamia oil. The structural elucidation of HEPA was carried out by FTIR, 1H NMR and 13C NMR spectroscopy. Physico-chemical studies were carried out by standard laboratory methods. Melting point of pongamia glabra oil and HEPA was measured through differential scanning calorimetry. Thermogravimetry/differential thermogravimetry analysis (TG/DTGA) was used to evaluate the thermal and kinetic behaviour of synthesised HEPA in nitrogen atmosphere under nonisothermal conditions with heating rates of 5, 10, 20, and 30 °C min−1. The TG curves of polymers at four heating rates were approximately in the same shape which indicated that mass loss is independent of heating rate. Obtained TGA data were analysed by the means of model-free isoconversional methods using Flynn–Wall–Ozawa and Kissinger–Akahira–Sunoseon applications on the whole range of temperature, and were found to be consistent. It was found that at the end of the decomposition process, the value of activation energy increases.