Mechanical Properties of r-PET/PP Blends Compatibilized by#br#PP-g-MA and Its Mixture

In order to develop PP blends with recycled polyethylene terephthalate(r-PET),the blends of r-PET with compatibilizer,r-PET/PP and compatibilized r-PET/PP blends were prepared.PP-g-MA and its mixture of POE-g-MA or EVA-g-MA with same functional group were used as compatibilizers.The tensile strength,flexural strength and modulus and impact strength of blends were characterized.The effect of compatibilizer and r-PET on mechanical properties of blends was studied.The results indicated that the mechanical properties of r-PET decreased by adding compatibilizer.But the tensile strength,flexural strength and modulus of iPP increased by introduction of r-PET,and the mechanical properties of r-PET/iPP blends increased by adding compatibilization of PP-g-MA further.The increased mechanical properties of uncompatibilized and compatibilized r-PET/iPP blends with increasing r-PET contents indicated the presence of reinforcement of r-PET in the iPP matrix.The r-PET/iPP blends with high strength and high toughness could be obtained by compatibilization of mixture of compatibilizers.Addition of POE-g-MA or EVA-g-MA increased the impact strength of PP-g-MA compatibilized r-PET/PP blends.The r-PET/PP blends with high performance could be obtained by compatibilization of mixture PP-g-MA and POE-g-MA.