L. Bove et al., TRANSPORT-PROPERTIES OF DICHLOROMETHANE IN GLASSY-POLYMERS .6. POLY(ETHYLENE-TEREPHTHALATE), Journal of applied polymer science, 62(7), 1996, pp. 1035-1041
Sorption and diffusion of dichloromethane vapor in amorphous poly(ethy
lene terephthalate) (PET) were investigated, with the aim of studying
how aging phenomena, at different temperatures, influence the transpor
t properties. It has been found that aging produces the appearance of
non-Fickian behavior in the sorption curves as well as the reduction o
f the diffusion coefficients. Furthermore, aging at 60 degrees C reduc
es the sorption of vapor at low activity, and this led to the hypothes
is of the presence of ordered domains in the aged samples. In this cas
e, the process of solvent-induced crystallization is favored, and it a
ppears at lower activity. (C) 1996 John Wiley & Sons, Inc.