Effectiveness of the Transesterification Catalyst on the Thermal, Dynamic-Mechanical and Rheological Properties of PET/PC Reactive Melting Blends

Authors

  • Luis C. Mendes,

    1. Instituto de Macromoléculas Professora Eloisa Mano-IMA, Universidade Federal do Rio de Janeiro-UFRJ, Centro de Tecnologia, Bloco J, P. O. Box 68525, Avenida Horácio Macedo, 2030 -21941-598, Rio de Janeiro, RJ, Brazil
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  • Patrícia S. C. Pereira,

    Corresponding author
    1. Instituto de Macromoléculas Professora Eloisa Mano-IMA, Universidade Federal do Rio de Janeiro-UFRJ, Centro de Tecnologia, Bloco J, P. O. Box 68525, Avenida Horácio Macedo, 2030 -21941-598, Rio de Janeiro, RJ, Brazil
    • Instituto de Macromoléculas Professora Eloisa Mano-IMA, Universidade Federal do Rio de Janeiro-UFRJ, Centro de Tecnologia, Bloco J, P. O. Box 68525, Avenida Horácio Macedo, 2030 -21941-598, Rio de Janeiro, RJ, Brazil.
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  • Valéria D. Ramos

    1. Instituto Politécnico do Rio de Janeiro, IPRJ, Universidade do Estado do Rio de Janeiro, UERJ, Nova Friburgo, RJ, Brazil
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Abstract

Reactive poly(ethylene terephthalate) / polycarbonate (PET/PC) melting blends were prepared with different cobalt catalyst and polymer compositions. The presence of catalyst increased the miscibility of the 20/80 (wt%) blend, according to differential scanning calorimetry (DSC) and dynamic-mechanical analyses (DMA). The catalyst also promoted the amorphisation of the PET chains. Besides, the catalyst caused drastic lowering of both moduli (storage and loss) and melt flow rate (MFR) of some blends. The best mechanical and processing properties were achieved for blends without catalyst, indicating that transesterification reactions prejudice mechanical properties.

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