Abstract
Potentialities of the bifunctional cell of the sensor type, in which acoustoelectric (based on surface-acoustic waves) and optical (in the visible spectral region) measurements of ammonia chemosorption by thin films of a PDMS-based functional polymer may be simultaneously performed, have been demonstrated. It has been found that the gas diffusion coefficient associated with chemosorption and calculated from optical measurements (2.65 × 10−11 cm2/s) differs from that obtained from acoustoelectric studies (4.16 × 10−12 cm2/s). The diffusion coefficient determined from the acoustoelectric data presumably characterizes the propagation of structural relaxation of polymer chains from chemosorption sites into the polymer bulk.
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Original Russian Text © E.I. Soborover, 2006, published in Vysokomolekulyarnye Soedineniya, Ser. B, 2006, Vol. 48, No. 10, pp. 1910–1915.
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Soborover, E.I. Bifunctional acoustooptical cell of the sensor type for studying gas chemosorption by polymer films. Polym. Sci. Ser. B 48, 277–281 (2006). https://doi.org/10.1134/S1560090406090132
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DOI: https://doi.org/10.1134/S1560090406090132