Properties of melt-processed poly(hydroxybutyrate-co-hydroxyvalerate)/starch 1: 1 blend nanocomposites
AUTOR(ES)
Magalhães, Natália F., Andrade, Cristina T.
FONTE
Polímeros
DATA DE PUBLICAÇÃO
28/05/2013
RESUMO
Melt blending of 1:1 poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and glycerol-plasticized starch (TPS) was performed in the presence of an organically-modified montmorillonite, incorporated at 2.5, 5, 7.5 and 10 wt% amounts. Scanning electron micrographs (SEM) revealed the role of the organoclay as a compatibilizing agent for the immiscible blend. The blends were also characterized by X-ray diffraction (XRD), tensile tests, humidity absorption and soil burial biodegradation tests. The results indicated improved properties of the hybrid materials in relation to TPS alone, with a faster biodegradation rate than PHBV.
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