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Solvent diffusion in a modified polyaniline
Author(s) -
Hsu W. P.,
Ho K. S.
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19971219)66:11<2095::aid-app5>3.0.co;2-c
Subject(s) - sorption , fick's laws of diffusion , polyaniline , diffusion , solvent , polymer , sulfonic acid , polymer chemistry , thermal diffusivity , propanol , chemistry , ethanol , materials science , chemical engineering , organic chemistry , thermodynamics , adsorption , physics , engineering , polymerization
A dodedyl benzene sulfonic acid doped polyaniline was synthesized and cast into films. Water and ethanol were used as the main diffusional probes to study this polymer from 25°C to 45°C. Sorption of water in this polymer was found to be almost independent of temperature, but sorption of ethanol in the same polymer decreased mostly with increasing temperature. Water diffusion was non‐Fickian, but ethanol diffusion was Fickian. Probably some rearrangement of polymer structure happened at temperatures between 40°C and 45°C as detected by two‐stage sorption of water at 40°C and an abrupt increase in ethanol diffusivity from 40°C to 45°C. 1‐Propanol diffusion at 32.5°C was also performed and also found to be Fickian, but the rate of diffusion was slower than that of ethanol. The sorbed amount of solvent in this polymer had the order (1‐propanol > ethanol > water) owing to the most hydrophobic structure of this polymer. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 2095–2101, 1997