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Synthesis and Characterization of Poly(3-hydroxybutyrate) and Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Polymer Mixtures Produced in High-Density Fed-Batch Cultures of Ralstonia eutropha (Alcaligenes eutrophus)

Authors :
Madden, L. A.
Anderson, A. J.
Asrar, J.
Source :
Macromolecules; August 1998, Vol. 31 Issue: 17 p5660-5667, 8p
Publication Year :
1998

Abstract

Alternate feeding of glucose and propionic acid to phosphate-depleted batch cultures of Ralstonia eutropha (reclassified from Alcaligenes eutrophus) produced poly(3-hydroxybutryate-co-3-hydroxyvalerate) [P(3HB-co-3HV)] with thermal properties markedly different from random copolymers of similar monomer content. These polymers exhibited a single glass transition and a single melting peak that was significantly higher than expected for a random copolymer. The polymers were found, by solvent fractionation and NMR, to be a mixture of poly(3-hydroxybutyrate) [P(3HB)] and a random copolymer, P(3HB-co-3HV). When compared with random copolymers of similar monomer content, the polymers produced by alternate substrate feeding displayed no improvement in mechanical properties and possessed similar aging characteristics.

Details

Language :
English
ISSN :
00249297 and 15205835
Volume :
31
Issue :
17
Database :
Supplemental Index
Journal :
Macromolecules
Publication Type :
Periodical
Accession number :
ejs1146583