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Effects of the blending sequence and interfacial agent on the morphology and mechanical properties of injection molded PC/PP Blends

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Summary

The effects of blending sequence and the addition of an interfacial agent (triblock copolymer styrene-butylene ethylene/styrene, Kraton G1652) on the morphology and the mechanical properties of Polycarbonate (PC)/Polypropylene (PP) blends prepared by injection molding were studied. This study presents an analysis of impact resistance, tensile properties and morphology of the raw materials and the blends at different compositions. The blends, before being injected, were prepared in a twin-screw extruder by different sequences of blending. The results indicate that the blending sequence and the presence of humidity significantly affect the properties and morphology of the blends. For ternary blends (PC/PP/Kraton), only one-step mixing before injection molding proved to be sufficient to improve mechanical properties. Increasing the amount of blending steps did not present a significant change in properties. With the addition of the interfacial agent, higher impact resistance and particle size reduction were observed.

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Authors and Affiliations

  1. Departamento de Ingeniería Química, Universidad de Guadalajara, Blvd. Marcelino García Barragán No. 1451, Guadalajara, Jalisco, C.P. 44430, Mexico

    R. A. Torres, J. Arellano-Ceja, M. E. Hernández-Hernández & R. González-Núñez

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  1. R. A. Torres
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  2. J. Arellano-Ceja
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  3. M. E. Hernández-Hernández
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  4. R. González-Núñez
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Correspondence to R. González-Núñez.

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Torres, R., Arellano-Ceja, J., Hernández-Hernández, M. et al. Effects of the blending sequence and interfacial agent on the morphology and mechanical properties of injection molded PC/PP Blends. Polym. Bull. 59, 251–260 (2007). https://doi.org/10.1007/s00289-007-0757-x

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  • DOI: https://doi.org/10.1007/s00289-007-0757-x

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