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Miscibility of bacterial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with ester substituted celluloses

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Summary

Blends of bacterial Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with cellulose acetate butyrate (CAB) and cellulose acetate propionate (CAP) were prepared by melt blending. When CAB or CAP content in the blends is ≥ 50%, the blends are stable, homogeneous mixed glasses, characterized by a glass transition that follows the Fox equation. When the cellulose ester content is lower than 50%, PHBV crystallizes upon room storage and the blends are partially crystalline. Besides the strongly composition dependent glass transition, another slightly composition dependent relaxation is observed by both DMTA and DSC measurements in the vicinity of the glass transition of PHBV. It is suggested that both blend components partake in both mobilization processes.

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Authors and Affiliations

  1. Dipartimento di Chimica “G. Ciamician” dell'Universita di Bologna, Via Selmi 2, I-40126, Bologna, Italy

    Nadia Lotti & Mariastella Scandola

  2. Centro di Studio per la Fisica delle Macromolecole del CNR, Via Selmi 2, I-40126, Bologna, Italy

    Nadia Lotti & Mariastella Scandola

Authors
  1. Nadia Lotti
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  2. Mariastella Scandola
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Lotti, N., Scandola, M. Miscibility of bacterial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with ester substituted celluloses. Polymer Bulletin 29, 407–413 (1992). https://doi.org/10.1007/BF00944838

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  • DOI: https://doi.org/10.1007/BF00944838

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