Summary: Aiming the development of new ductile and porous biodegradable materials, blends of poly(3-hydroxybutyrate-co-3-hydroxyvalerate), P(3HB-co-3HV), and polycaprolactone triol, PCL-T, with compositions varying from 100/0 to 70/30 P(3HB-co-3HV)/PCL-T (w/w), were obtained by casting. The phase behavior, the morphology and the crystallinity of P(3HB-co-3HV)/PCL-T blends were studied by differential scanning calorimetry, thermogravimetric analysis, scanning electron microscopy and X-ray diffraction. DSC analyses showed that the glass transition temperature of P(3HB-co-3HV) decreases with the addition of PCL-T up to 15 wt%, evidencing that mixtures with higher PCL-T contents provide more flexible films, acting as a plasticizer, but the porosity and onset degradation temperature of P(3HB-co-3HV) are not affected.
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