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Fracture toughness of glass microsphere-filled polypropylene and polypropylene/poly (ethylene terephthalate-co-isophthalate) blend-matrix composites

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Abstract

The fracture behaviour of glass microsphere-filled polypropylene/poly(ethylene terephthalate-co-isophthalate) blend-matrix composites was investigated in comparison with that of the glass microsphere-filled PP composites. Depending on the deformability displayed by the composite, it was carried out through the linear-elastic fracture mechanics or by applying the J-integral concept. The matrix ductility was regulated in the composite through the glass bead surface treatment applied with different silane-coupling agents, as well as with the addition of maleated PP as polymer compatibilizer. Whereas all the composites failed in a brittle manner at moderate impact speed, quasi-brittle fracture behaviour was only observed at low strain rate in composites having high and medium interfacial adhesion level. Results showed that composites containing both aminosilane-treated glass microspheres and maleated PP showed the highest values of fracture toughness. In composites with low adhesion level between matrix and glass beads, the critical J-integral value diminished due to the presence of PET.

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Acknowledgements

Authors thank to the Spanish Ministry of Science (MEC) for financial support of MAT2004-01563 project. D. Arencón also thanks to the CIRIT (Government of Catalonia, Spain) for a doctoral fellowship.

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Authors and Affiliations

  1. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica, Centre Català del Plàstic, Universitat Politècnica de Catalunya, Vapor Universitari de Terrassa. C. Colom 114, E-08222, Terrassa, Barcelona, Spain

    D. Arencón, J. I. Velasco, V. Realinho, M. Sánchez-Soto & A. Gordillo

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  1. D. Arencón
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  2. J. I. Velasco
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  3. V. Realinho
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  4. M. Sánchez-Soto
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  5. A. Gordillo
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Correspondence to J. I. Velasco.

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Arencón, D., Velasco, J.I., Realinho, V. et al. Fracture toughness of glass microsphere-filled polypropylene and polypropylene/poly (ethylene terephthalate-co-isophthalate) blend-matrix composites. J Mater Sci 42, 19–29 (2007). https://doi.org/10.1007/s10853-006-1036-1

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  • DOI: https://doi.org/10.1007/s10853-006-1036-1

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