Influence of strain rate on the toughening effect of CaCO3 in polypropylene/CaCO3 composites |
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| Authors: | Seyyed Mojtaba Zebarjad Sahar Golmakaniyoon |
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| Affiliation: | Department of Materials Science and Engineering, Engineering Faculty Ferdowsi University of Mashhad, , Azadi Square, Mashhad, Iran |
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| Abstract: | The effects of 40 and 50 wt% of calcium carbonate on the mechanical properties of polypropylene were investigated by uniaxial tensile deformation at room temperature and at loading rates of 5, 50, and 125 mm/min. The results showed that the addition of calcium carbonate to polypropylene decreased yield strength while increasing modulus. The decreases yield strength was attributed to the poor adhesion between filler and matrix. The tensile toughness of polypropylene was improved by the addition of calcium carbonate particles at constant strain rate because of the plastic deformation of interparticle ligaments following particle‐matrix debonding. The (strain rate) sensitive behavior of the composites (at constant calcium carbonate content) was observed. J. VINYL ADDIT. TECHNOL., 19:271–275, 2013. © 2013 Society of Plastics Engineers |
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