Thermo-oxidative-kinetic study of cinnamyl diesters

摘要: Abstract The thermo-oxidative behavior and kinetic study of cinnamyl diesters having different aliphatic chain lengths in the structure were studied by TG/DSC/FTIR coupled method. degradation processes on esters occurred through several overlapping steps, between 150 450 °C, linked to gaseous products emitted with changes E(α) values as (α) increased. initial stage diester (for α ≤ 0.15) was independent kind length chain, energetic barrier necessary break ester linkages transformation degree (ca. 60–80 kJ mol−1). A progressive increase from ca. 80 kJ mol−1 200–250 kJ mol−1 0.15 ≤ α ≤ 0.40) suggested existence competitive reactions which due chemical recombination gas phase, involving oxidation volatile organic fragments oxygen. However, α is changed 0.40 ≤ α ≤ 0.75, high data dispersion marked experimental error indicated a strong dependence parameters conversion complexity taking place. Finally, for 0.8 ≤ α decrease modifications mechanism that easy oxygen accessibility toward sample promotes fast gasification reaction carbonaceous residues.