Resumo

POLEY, Luiz H. et al. Water and vapor permeability at different temperatures of poly (3-Hydroxybutyrate) dense membranes. Polímeros [online]. 2005, vol.15, n.1, pp.22-26. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282005000100007.

Polyhydroxyalkanoates (PHAs) are polymers produced from renewable resources with biodegradability and biocompatibility, being therefore attractive for medical and pharmaceutical purposes. Poly (3-hydroxybutyrate) (PHB) is the most important polymer of this family by considering the biotechnology process of its synthesis. In the present study, dense films of PHB were prepared by casting from chloroform solutions (1% m/m). Permeability studies with water, methanol, ethanol and n-propanol were performed using the gravimetric method at different temperatures (from 50 ºC to 65 ºC). Results provide new data on permeability coefficients of PHB membranes.

Palavras-chave : Polymers; permeability coefficient; gravimetry.

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