Knowledge of diffusion coefficients of small molecules in glassy polymer matrices, especially in the vicinity of the glass transition temperature, Tg, is important in many applications. We propose a method using energy transfer between small molecules as measured by fluorescence emission intensities to examine the diffusion of small molecules in glassy polymer matrices. This technique enables one to calculate diffusion coefficients without determining the actual spatial concentration distribution. Specifically, this method involves bringing together two monodisperse polymer films where one film is doped with a fluorescence donor, and the other, a fluorescence acceptor.
|Original language||English (US)|
|Number of pages||2|
|Journal||American Chemical Society, Polymer Preprints, Division of Polymer Chemistry|
|State||Published - Apr 1 1989|
ASJC Scopus subject areas
- Polymers and Plastics