The 0 temperature of poly (N-vinyl pyrrolidone) (PVP) in water has been determined accurately by studying the variation of the cloud points of polymer solutions in the presence of an electrolyte (Na2CO 3). The cloud point of PVP solutions decreased linearly with electrolyte concentration. The 0 temperature was determined by extrapolating the cloud points of dilute solutions to polymer volume fractions of 1. The phase diagram of PVP in water was also constructed by the same procedure over wider polymer concentrations.
Посилання на статтю:
Theta temperatu re of poly (N-vi nyl pyrrolidone ) in water / P. Sakellariou // Polymer. – 1992. – Vol 33. – P. 1339-1342.