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Effect of CaCO₃ on the Mechanical Properties of Polyethylene Terephthalate/Polypropylene Blends




Author(s)

Pham Thi Hong Nga

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DOI:10.17265/2161-6221/2019.5-6.002

Mechanical Engineering Faculty, HCMC University of Technology and Education, 1 Vo Van Ngan St., Thu Duc District, HCM City 700000, Vietnam

The aim of this work was to study the influence of CaCO₃ in both tensile and flexural mechanical properties of a PET (polyethylene terephthalate)/PP (polypropylene). Four compositions of PET/PP/CaCO₃ blend were prepared by injection molding with CaCO₃ content of 0, 2, 4 and 6 wt%. The samples were cut according to the ASTM (American Society for Testing and Materials) standard and tested by using universal testing equipment. The results show that the mechanical properties of the PET/PP/CaCO₃ composites with 2% and 4 wt% of CaCO₃ composition were better than that of the PET/PP composites. While the content of CaCO₃ is 6 wt%, the serious phase separation between PET and PP resulted in poor mechanical properties of the PET/PP/CaCO₃ samples. This study shows that CaCO₃ has played a role to improve the tensile and flexural properties of the mixing product if it is present only in a small amount.

PET, PP, CaCO₃, PET/PP blend, mechanical properties.