Thermal behavior of Ricinodendron heudelotii oil polymer

In this present study, the photopolymerization of Ricinodendron heudelotii (R. heudelotii) oil have been carried out with iron(III) tris(oxalato) ferrate(III) tetrahydrate (Fe[Fe(C2O4)(3)]center dot 4H(2)O) as photoinitiator under UV radiation of 254 nm at 40 A degrees C in dimethyl sulfoxide. The thermal decomposition of the R. heudelotii oil polymer is studied using thermogravimetry and differential scanning calorimetry methods. The R. heudelotii oil polymer exhibits three stage decomposition patterns, and the main decomposition occurs at the temperature range 300-500 A degrees C. The apparent activation energy (E (a)) of the decomposition has been calculated by three non-isothermal methods of Flynn-Wall-Ozawa, Kissinger and modified Coats-Redfern. The Johnson-Mehl-Avrami (n < 1) model was found to be the appropriate reaction model for the third and main decomposition step. The model could be established as . The value of pre-exponential factor (A) is also determined and was found to be 4.11 x 10(17) min(-1).