Abstract

Molecular motion in a poly(vinylphenol) (PVPh)/poly(ethylene oxide) (PEO) blend (PVPh/pEO) is studied by examining the temperature dependence of the line width of high-resolution solid-state 13 C NMR spectra. PEO molecules in the crystalline phase undergo motion in the vicinity of room temperature. The motion is governed by an activation energy and correlation time similar to those related to the glass transition of amorphous polymers. For PVPh/PEO, the onset of backbone chain motion of amorphous PEO and PVPh in the blend reflects on the temperature dependence of 13 C line width. The molecular motions of the two polymers in the miscible amorphous phase affect each other strongly although the chain dynamics of the two polymers still have a different characteristic temperature dependence

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