DYEING IN SUPERCRITICAL CO2 - DETERMINATI ON OF PARAMETERS INFLUENCING THE STRUCTURAL CHARACTERISTICS OF POLYA(ETHYLENE TEREPHTHALATE) FIBROUS MATERIAL
D. Knittel et al., DYEING IN SUPERCRITICAL CO2 - DETERMINATI ON OF PARAMETERS INFLUENCING THE STRUCTURAL CHARACTERISTICS OF POLYA(ETHYLENE TEREPHTHALATE) FIBROUS MATERIAL, Die Angewandte makromolekulare Chemie, 218, 1994, pp. 69-79
The effect of dyeing in supercritical fluids on characteristics of the
polymeric structure is investigated using poly(ethylene terephthalate
) fibers. The supercritical fluid (CO2) causes a decrease in the glass
transition temperature and the formation of a network of stabilizing
crystallites, which - without the use of a fluid - can only be obtaine
d at significantly higher temperatures. The implications of fiber stru
cture for successful dyeing or impregnation of fibrous material in sup
ercritical systems are discussed.