Properties of Melt-processed Poly(hydroxybutyrate-cohydroxyvalerate)/ starch 1:1 Blend Nanocomposites
Magalhães, Natália F.; Andrade, Cristina T.
http://dx.doi.org/10.4322/polimeros.2013.034
Polímeros: Ciência e Tecnologia, vol.23, n3, p.366-372, 2013
Abstract
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
Keywords
Biodegradable blend, thermoplastic starch, PHBV, modified montmorillonite
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