Issue 27, 2025

Precise detection of local relaxation of amorphous polymers at low temperatures via O2 diffusion probed by a dual-luminescent imide compound

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 (O2) diffusion. The PH of the imide compound dispersed in the polymer matrices was quenched by O2, and the temperature-dependent variation of the PH intensity indicates that the γ-relaxation of the polymer matrix plays a crucial role in O2 diffusion. This method offers a novel analytical tool for detecting LR phenomena in amorphous polymers at low temperatures.

Graphical abstract: Precise detection of local relaxation of amorphous polymers at low temperatures via O2 diffusion probed by a dual-luminescent imide compound

Supplementary files

Article information

Article type
Communication
Submitted
18 Apr 2025
Accepted
17 Jun 2025
First published
26 Jun 2025

Soft Matter, 2025,21, 5393-5397

Precise detection of local relaxation of amorphous polymers at low temperatures via O2 diffusion probed by a dual-luminescent imide compound

R. Watanabe, M. Doi, H. Liu, M. Tokita and S. Ando, Soft Matter, 2025, 21, 5393 DOI: 10.1039/D5SM00394F

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