Abstract
Abstract The diffusion of 1,4-dihydroxyanthraquinone and C. I. Disperse Orange 3 in poly(ethylene terephthalate) (PET) from the trichloroethylene (TRI) and isooctance (ISO) dyebath was investigated by the method of the cylindrical film-roll. The stability of PET in TRI and ISO at high temperatures was also examined. The degradation of PET by solvents was in the following order: water>TRI>tetrachloroethylene (TCE) and ISO. The diffusion coefficients of Orange 3 from various solvents at 90°C were in the order: TRI>TCE>water>ISO. The activation energy of diffusion from ISO was much larger than that from TRI, the latter being nearly identical to that from TCE. The Arrhenius plots of the diffusion coefficients in PET indicated some transitions. The glass transition temperature of PET in TRI was lower than that in TCE. The diffusion coefficient and the surface concentration of Orange 3 from ISO were increased by the addition of water, while those from TRI were not changed within the range of experimental error.
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