Physicochemical and mechanical properties of mixed culture polyhydroxyalkanoate (PHBV)

Arcos-Hernandez, Monica V., Laycock, Bronwyn, Donose, Bogdan C., Pratt, Steven, Halley, Peter, Al-Luaibi, Salah, Werker, Alan and Lant, Paul A. (2013) Physicochemical and mechanical properties of mixed culture polyhydroxyalkanoate (PHBV). European Polymer Journal, 49 4: 904-913. doi:10.1016/j.eurpolymj.2012.10.025

Author Arcos-Hernandez, Monica V.
Laycock, Bronwyn
Donose, Bogdan C.
Pratt, Steven
Halley, Peter
Al-Luaibi, Salah
Werker, Alan
Lant, Paul A.
Title Physicochemical and mechanical properties of mixed culture polyhydroxyalkanoate (PHBV)
Journal name European Polymer Journal   Check publisher's open access policy
ISSN 0014-3057
Publication date 2013-04
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.eurpolymj.2012.10.025
Volume 49
Issue 4
Start page 904
End page 913
Total pages 10
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2013
Language eng
Formatted abstract
The mechanical properties of poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) copolymers with 3HV unit content ranging from 12 mol% to 72 mol% were evaluated. Samples were produced using a naturally enriched mixed culture fed with acetic and propionic acids. A range of feeding strategies was used to explore the manipulation of comonomer composition and sequence distribution of the monomeric units in order to influence mechanical properties. GC/MS, 13C NMR and DSC analysis of the resulting solvent cast films revealed that the as-produced PHAs were a mixture of copolymers distinct in microstructure and/or composition. Atomic force microscopy demonstrated the formation of varying phase structures as well as surface morphologies. In spite of the range of microstructure or compositional variation that was achieved through feeding strategies, all samples but one exhibited mechanical properties similar to the homopolymer P(3HB). The one distinct copolymer, with 43 mol% 3HV content, showed significantly increased elongation to break, as assessed after 2 weeks of ageing. These results were attributed to the formation of different phase structures arising from the competition between cocrystallisation and phase segregation in blends of semicrystalline copolymers.
Keyword Activated sludge
Mechanical properties
Mixed culture
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 23 November 2012.

Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 15 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 09 Jan 2013, 09:18:06 EST by Dr Bogdan Donose on behalf of Advanced Water Management Centre