Isothermal crystallization of poly(3-hydroxybutyrate) studied by terahertz two-dimensional correlation spectroscopy

01 natural sciences 0104 chemical sciences
DOI: 10.1063/1.3673847 Publication Date: 2012-01-06T12:48:32Z
ABSTRACT
The isothermal crystallization of poly(3-hydroxybutylate) (PHB) was studied by monitoring the temporal evolution of terahertz absorption spectra in conjunction with spectral analysis using two-dimensional correlation spectroscopy. Correlation between the absorption peaks and the sequential order of the changes in spectral intensity extracted from synchronous and asynchronous plots indicated that crystallization of PHB at 90 °C is a two step process, in which C-H···O=C hydrogen bonds are initially formed before well-defined crystal structures are established.
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