Nonisothermal crystallization kinetics of polypropylene/syndiotactic 1, 2-polybutadiene blends

The nonisothermal crystallization kinetics of PP, PP/s-1, 2 PB (90/10) blends were investigated by DSC at various cooling rate of 1°C/min, 5°C/min, 10°C/min, 15°C/min, and 20°C/min, and the data were treated using Jeziorny, Ozawa and Mo methods. The results of analysis show that the Mo method is very feat, but the Ozawa method has a blemish. It is feat that the data of the blends were treated using Jeziorny method too, but it has a blemish to PP. The crystallization rate of the blends is slightly higher than that of pure PP at the same cooling rate. The s-1, 2 PB has accelerative the function of crystallinity to the PP. The activation energies have been evaluated by Kissinger method to be 275.6 kJ/mol and 234.7 kJ/mol for PP and the blends, respectively. The addition of s-1, 2 PB decreases the activation energy of crystallization of PP, which can be used as nucleating agent during nonisothermal crystallization process of PP.