Resumo

OREFICE, Rodrigo L.; VASCONCELOS, Wander L.  e  MORAES, Maria Antonieta S.. Phase stability of polycarbonate-polystyrene blends evaluated by micro-FTIR, thermal analyses and scanning electron microscopy. Polímeros [online]. 2004, vol.14, n.2, pp.129-133. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282004000200017.

In the last decade, a progressive reduction on the development of new homopolymers could be observed, while processes, such as blending, that combine commercially available polymers were emphasized. In this work, polycarbonate-polystyrene blends were extruded in compositions from 0% to 100% of polycarbonate in weight. The phase separation process was studied by combining a series of analytical techniques such as scanning electron, optical and infrared microscopy (micro-FTIR). Electron and optical microscopy allowed the determination of a correlation between phase morphology and the degree of phase stability of the system. The composition of the phases and information on phase stability were determined by using micro-FTIR. The Flory-Huggins interaction parameter could also be calculated from the micro-FTIR data.

Palavras-chave : Polymer blends; polycarbonate; polystyrene; infrared microscopy.

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