This is due to the fact that at lower heating rates, primary oxidation products (such as hydroperoxides), which are generated during the initial stage of oxidation, subsequently react with excess oxygen to form low molecular weight compounds such as aldehydes and acids (intermediate oxidation products), which remain in solution,accelerating the degradation process. On the other hand, at higher heating rates, these intermediate products evaporate before they can react further with the oil solution, shifting DSC signal toward higher values