Abstract
Poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/CaCO3blends were prepared by solution blend method. The effect of CaCO3on the thermal and crystalline morphology properties was studied by differential scanning calorimetry (DSC), thermogravimetry (TG) and polarizing optical microscopy (POM) analyses. DSC showed the CaCO3affected the crystallization behavior of PHBV as heterogeneous nucleation agent. TG results indicated better processability of the blends with 3wt% CaCO3than that of pure PHBV. Integrated Maltese crossed spherulitic morphologies were revealed for both pure PHBV and PHBV/CaCO3blend. While small-sized PHBV spherulites were formed when CaCO3added to PHBV.
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