Deuterated polymers for probing phase separation using infrared microspectroscopy

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dc.contributor.authorRussell, RAen_AU
dc.contributor.authorDarwish, TAen_AU
dc.contributor.authorPuskar, Len_AU
dc.contributor.authorMartin, DEen_AU
dc.contributor.authorHolden, PJen_AU
dc.contributor.authorFoster, LJRen_AU
dc.date.accessioned2016-10-25T00:57:29Zen_AU
dc.date.available2016-10-25T00:57:29Zen_AU
dc.date.issued2013-12-23en_AU
dc.date.statistics2016-10-25en_AU
dc.description.abstractInfrared (IR) microspectroscopy has the capacity to determine the extent of phase separation in polymer blends. However, a major limitation in the use of this technique has been its reliance on overlapping peaks in the IR spectra to differentiate between polymers of similar chemical compositions in blends. The objective of this study was to evaluate the suitability of deuteration of one mixture component to separate infrared (IR) absorption bands and provide image contrast in phase separated materials. Deuteration of poly(3-hydroxyoctanoate) (PHO) was achieved via microbial biosynthesis using deuterated substrates, and the characteristic C–D stretching vibrations provided distinct signals completely separated from the C–H signals of protonated poly(3-hydroxybutyrate) (PHB). Phase separation was observed in 50:50 (% w/w) blends as domains up to 100 μm through the film cross sections, consistent with earlier reports of phase separation observed by scanning electron microscopy (SEM) of freeze-fractured protonated polymer blends. The presence of deuterated phases throughout the film suggests there is some miscibility at smaller length scales, which increased with increasing PHB content. These investigations indicate that biodeuteration combined with IR microspectroscopy represents a useful tool for mapping the phase behavior of polymer blends.en_AU
dc.identifier.citationRussell, R. A., Darwish, T. A., Puskar, L., Martin, D. E., Holden, P. J., & Foster, L. J. R. (2014). Deuterated polymers for probing phase separation using infrared microspectroscopy. Biomacromolecules, 15(2), 644-649. doi:10.1021/bm4017012en_AU
dc.identifier.govdoc7403en_AU
dc.identifier.issn1526-4602en_AU
dc.identifier.issue2en_AU
dc.identifier.journaltitleBiomacromoleculesen_AU
dc.identifier.pagination644-649en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/bm4017012en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7880en_AU
dc.identifier.volume15en_AU
dc.language.isoenen_AU
dc.publisherACS Publicationsen_AU
dc.subjectPolymersen_AU
dc.subjectDeuterationen_AU
dc.subjectBiosynthesisen_AU
dc.subjectElectron microscopyen_AU
dc.subjectElectronsen_AU
dc.subjectSolubilityen_AU
dc.titleDeuterated polymers for probing phase separation using infrared microspectroscopyen_AU
dc.typeJournal Articleen_AU
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