Polymer and solvent dynamics in a polystyrene/di-2-ethylhexyl phthalate solution
Photon correlation spectroscopy (PCS) and dielectric spectroscopy (DS) are employed to study, respectively, the polymer and solvent dynamics in a polystyrene solution with di-2-ethylhexyl phthalate. The depolarized PCS and DS experiments revealed the presence of two primary relaxations in a PS/DOP solution displaying a broad but single calorimetric glass transition. The slow and fast primary relaxations are influenced mainly by the polymer and the solvent dynamics, respectively. Both relaxations are characterized by very broad distribution of relaxation times, at low T. This is discussed in terms of the environmental dissimilarities present in two component systems.
Key wordsPhoton correlation spectroscopy dielectric relaxation concentrated solutions
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