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Article Abstract
Local relaxation (LR) of six types of amorphous polymers was precisely monitored at low temperatures (<160 K) using the intensity ratio of phosphorescence (PH) to fluorescence of a dual-luminescent imide compound as a probe for oxygen (O) diffusion. The PH of the imide compound dispersed in the polymer matrices was quenched by O, and the temperature-dependent variation of the PH intensity indicates that the γ-relaxation of the polymer matrix plays a crucial role in O diffusion. This method offers a novel analytical tool for detecting LR phenomena in amorphous polymers at low temperatures.
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