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Changes in physical and mechanical properties of poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) during degradation in a composting medium were studied. Effect of composting of up to 50 days was studied. Specimen weight loss, scanning electron microscopy (SEM), capillary viscometry, Fourier-transform infrared spectroscopy with accessory for attenuated total reflectance (FTIR-ATR), differential scanning...
A poly(hydroxybutyrate-co-hydroxyvalerate) with 9% hydroxyvalerate content has been thermally degraded to give a set of materials of different molecular weights. The effect of molecular weight on the lamellar structure, thermal and mechanical properties was investigated. The long period, lamellar and amorphous thickness all increase as molecular weight increases; their values vary linearly with 1/(molecular...
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