2.5. Thermal properties
2.5.1. Differential scanning calorimetry (DSC)
Samples of each microcomposite films were placed in alumi-num pans, hermetically sealed, in the equipment sample chamber (DSC-2920, TA Instruments), under nitrogen atmosphere,with a flow of 50 mL min1 and warming rate of 5 8C min1until300 8C,sustainedby5 min.Thecrystalstransition
temperature (Tg) was obtained at the inflection point between the base lines through the change in the heat capacity of the sample.