Effect of Calcium Carbonate Nano Particles on Morphology, Mechanical Properties and Crystallization Kinetic of PP/PET Blend

The aim of this research is investigation the effect of CaCO3nano-particles on morphology, mechanical properties and crystallization kinetic of PP/PET blend. Then, different samples containing 3, 5 and 8 phr of nano sized CaCO3were prepared via melt blending and two screw extruder. The results of scanning electron microscopy demonstrated that the addition of 5%wt of PP-GMA as compatibilizer, together with 3 phr of CaCO3nano-particles had pronounced effect on morphology development of PP/PET polymer blend. According to mechanical properties, the sample containing 3 phr of nano CaCO3 indicated the highest values of tensile strength and elastic modulus. The studying of crystallization behavior revealed that the compatibilization of PP/PET blend results in increment of PP crystallinity and decrement of PET crystallinity. The crystallinity degree of PP decreases and crystallinity of PET increases with the addition of nano CaCO3, as well. Finally, the crystallization kinetic of PP/PET blend was estimated by Avrami equation.