Crystallization and morphology of a bacterial thermoplastic: poly-3-hydroxybutyrate

This paper presents a number of interesting results on the physical properties of poly-3-hydroxybutyrate (PHB). Data are presented on crystallization kinetics, morphology of melt- and solution-crystallized PHB, the variation of lamellar thickness with crystallization temperature, and the assessment...

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Bibliographic Details
Published in:Journal of materials science 1984-09, Vol.19 (9), p.2781-2794
Main Authors: BARHAM, P. J, KELLER, A, OTUN, E. L, HOLMES, P. A
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Miscellaneous
Natural polymers
physical properties
Physicochemistry of polymers
plastics
polymers
thermodynamics
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Summary:This paper presents a number of interesting results on the physical properties of poly-3-hydroxybutyrate (PHB). Data are presented on crystallization kinetics, morphology of melt- and solution-crystallized PHB, the variation of lamellar thickness with crystallization temperature, and the assessment of some thermodynamic quantities. These properties include surface free energies, heat of fusion and melting, and glass transition temperatures. It is shown that the special properties of PHB such as the large spherulite size, which is probably due to its exceptional purity, make it an ideal material for model studies of polymer crystallization and morphology. For example, the authors show that the variation of growth rate with crystallization temperature is consistent with the very latest theories; and that the single crystal morphology has important implications for the understanding of crystal growth in other polymer systems.
ISSN:0022-2461
1573-4803
DOI:10.1007/bf01026954