Differential scanning calorimetry (DSC) was conducted using a Netzsch 200 F3 instrument under nitrogen atmosphere. The temperature range of 30-190 °C was employed for the pristine polymers, while the functionalized polymers were analyzed in the range of 30-140 °C. The samples underwent a heating-cooling-heating cycle with a heating rate of 10 °C min -1 . The glass transition temperature (Tg) was determined at the midpoint of the specific heat increment.