The role of the compatibilizer on the microindentation hardness of iPP/PC blends |
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| Authors: | A Hellati A Douibi S Boufassa R Benavente D Benachour FJ Baltá Calleja |
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| Affiliation: | 1. Faculty of Science and Technology, Med Bachir El Ibrahimi University, Algeria;2. LMPMP, Department of Process Engineering, Faculty of Engineering, Ferhat Abbas University, Sétif, Algeria;3. Department of Chemistry ‐ Physics, Instituto De Ciencia Y Tecnologia De Polimeros (ICTP‐CSIC), Madrid, Spain;4. Department of Macromolecular Physics, Instituto De Estructura De La Materia, IEM‐CSIC, Madrid, Spain |
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| Abstract: | Blends of isotactic polypropylene (iPP) and polycarbonate (PC) with and without a compatibilizer were prepared using a Brabender Haake Rheocord at 260°C and 32 rpm. Maleic anhydride grafted styrene‐ethylene/butylene‐styrene (SEBS‐g‐MAH) and maleic anhydride grafted ethylene–propylene diene (EPDM‐g‐MAH) were chosen as compatibilizers and their proportion was set to 5, 10, and 15 wt%, respectively. The thermal properties and crystallization behavior were determined by differential scanning calorimetry (DSC) and wide angle X‐ray scattering (WAXS). Micromechanical properties were also investigated using a Vickers microindentation tester. The DSC analysis indicates that the melting temperature of iPP in the all the blends, compatibilized and uncompatibilized ones, remains constant and is almost the same as those of the pure component. On the other hand, it is shown that the degree of crystallinity of iPP in the blends calculated by DSC and WAXS is dependent of the composition of the polymeric mixture. However the hardness (H) decreases with increasing PC content until the composition of iPP/PC (75/25) is reached, whereas for larger PC content values, H increases. The same trend was obtained with the addition of both compatibilizers. POLYM. ENG. SCI., 56:1138–1145, 2016. © 2016 Society of Plastics Engineers |
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