Ms. Hedenqvist et F. Doghieri, The significance of the zero-concentration diffusivity value obtained fromintegral desorption data, POLYMER, 43(1), 2002, pp. 223-226
n-Hexane zero-concentration diffusivity in high density polyethylene obtain
ed 'indirectly' from integral desorption measurements using the free volume
concept was compared with the zero-concentration diffusivity obtained dire
ctly at low-n-hexane activities using a quartz-ring system. The difference
between the results obtained by the indirect and direct methods was within
the experimental error. The concentration dependence of the diffusivity pre
dicted by the Cohen-Turnll-Fujita free volume theory was in accordance with
experimental data. (C) 2001 Elsevier Science Ltd. All rights reserved.