Rheological investigations of poly(hydroxybutyrate) and poly(ethylene oxide) solutions and their mixtures
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2014-01-01
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Abstract
Rheological investigations were carried out of poly (hydroxybutyrate) and poly (ethylene oxide) solutions in chloroform as well as of their mixtures in different ratios. It was established that all solutions (pure polymers and their mixtures) exhibit non-Newtonian (shear thinning) behaviour which is described by the Ostwald-de Waele model. The value of the activation energy for the solutions can be a measure for the influence of the temperature on their rheological behaviour.