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TitleFilm blowing of PHBV blends and PHBV-based multilayers for the production of biodegradable packages
Author(s)Cunha, Mara
Fernandes, Bruno Daniel
Covas, J. A.
Vicente, A. A.
Hilliou, L.
Issue date10-Jan-2016
PublisherJohn Wiley and Sons
JournalJournal of Applied Polymer Science
CitationCunha, Mara; Fernandes, Bruno Daniel; Covas, José A.; Vicente, A. A.; Hilliou, Loïc, Film blowing of PHBV blends and PHBV-based multilayers for the production of biodegradable packages. Journal of Applied Polymer Science, 133(2), 1-11, 2016
Abstract(s)Poly(hydroxy butyrate-co-valerate) (PHBV) is a biodegradable polymer that is difficult to melt process into films. Such difficulty is mirrored in the lack of literature on film blowing of PHBV- or PHBV-based materials. To circumvent this problem, 70/30 wt % blends of PHBV with a biodegradable compound (PBSebT), or with poly(butylene adipate-co-terephtalate) (PBAT), were prepared and tested for extrusion film blowing. Both blends showed a similar rheological pattern at 175°C, which is the maximum processing temperature with tolerable thermal degradation. Blending stabilized the film bubbles, thus widening the processing window. However, film properties such as tensile modulus, strain at break and tear resistance remained isotropic and crystallinity characteristics in the machine and transverse directions were generally similar. To bypass the thermal degradation associated with polymer blending, PHBV/PBAT films were coextruded. These showed enhanced functional properties when compared with films blown from blends. The mechanical properties of bilayered films matched those of films blown from commercial PBAT designed for food packaging.
Publisher version
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series
IPC - Artigos em revistas científicas internacionais com arbitragem

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