Polylactide/poly(hydroxybutyrate-co-hydroxyvalerate) blends: Morphology and mechanical properties

The morphology and the mechanical properties of polylactide/poly(hydroxybutyrate-co-hydroxyvalerate) blends of various compositions were studied. The statistical analysis of the scanning electron microscopy images allowed finding two statistical ensembles of the minor-phase particles. The first ense...

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Bibliographic Details
Published in:Express polymer letters 2014, Vol.8 (8), p.609-617
Main Authors: Gerard, T., Budtova, T., Podshivalov, A., Bronnikov, S.
Format: Article
Language:English
Subjects:
Engineering Sciences
Materials
mechanical properties
morphology
polyhydroxyalkanoate
polylactide
Polymer blends and alloys
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Summary:The morphology and the mechanical properties of polylactide/poly(hydroxybutyrate-co-hydroxyvalerate) blends of various compositions were studied. The statistical analysis of the scanning electron microscopy images allowed finding two statistical ensembles of the minor-phase particles. The first ensemble involves the dispersed particles, whereas the second one contains the coalesced particles. The mean diameters of both dispersed and coalesced minor-phase particles were calculated and plotted against the blend composition. Young's modulus, tensile strength, elongation at break, and Charpy impact strength of the blends were determined and examined as a function of the blend composition. The Young's modulus values were shown to be in accordance with theoretical predictions.
ISSN:1788-618X
1788-618X
DOI:10.3144/expresspolymlett.2014.64