Physical properties of poly(hydroxybutyrate) and copolymers of hydroxybutyrate and hydroxyvalerate

The major physical properties of poly(hydroxybutyrate) (PHB) and its copolymers with hydroxyvalerate (PHB/HV) and those of their blends are summarised. Cases of liquid-liquid phase separation in homopolymer copolymer blends are reported and conditions where further phase separation occurs during cry...

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Bibliographic Details
Published in:FEMS microbiology letters 1992-12, Vol.103 (2), p.289-298
Main Authors: Barham, Peter J., Barker, Phil, Organ, Sally J.
Format: Article
Language:English
Subjects:
Blends
Crystalization
Hydroxybutyrate
Hydroxyvalerate copolymers
Morphology
Nucleation
Physical properties
Poly(hydroxybutyrate)
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Summary:The major physical properties of poly(hydroxybutyrate) (PHB) and its copolymers with hydroxyvalerate (PHB/HV) and those of their blends are summarised. Cases of liquid-liquid phase separation in homopolymer copolymer blends are reported and conditions where further phase separation occurs during crystallisation are documented. The crystallinity and degree of comonomer inclusion in the crystallisation of copolymers are described and quantified. It is argued that the mechanism for the inclusion of comonomer units in the crystals is of a kinetic rather than an equilibrium nature.
ISSN:0378-1097
1574-6968
DOI:10.1016/0378-1097(92)90322-F