Please use this identifier to cite or link to this item:
|Title:||Film blowing of PHBV blends and PHBV-based multilayers for the production of biodegradable packages|
Fernandes, Bruno Daniel
Covas, J. A.
Vicente, A. A.
|Publisher:||John Wiley and Sons|
|Journal:||Journal of Applied Polymer Science|
|Citation:||Cunha, 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.|
|Appears in Collections:||CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series|
IPC - Artigos em revistas científicas internacionais com arbitragem