A version of the corresponding states theorem of Prigogine for a polymer liquid system has been applied to a poly(ethylene oxide) (PEO)/atactic poly(methyl methacrylate) (At-PMMA) mixture and found to afford a good prediction of miscibility for this system semi-quantitatively. A value of the contact energy term, X12, of -0.3 J cm-3 was calculated by using independent literature values of interaction parameter, x12, computed at about 80°C. The shape of the curve of x12 V*1 over temperature indicates that the PEO/At-PMMA mixture is miscible in the liquid state from 0 to 200°C. Extrapolation of x12 V*1 curve predicts a lower critical solution temperature (LCST) of about 350°C for this system.
Miscibility prediction based on the corresponding states theory poly(ethylene oxide)atactic poly(methyl methacrylate) system
S Cimmino;C Silvestre
1989
Abstract
A version of the corresponding states theorem of Prigogine for a polymer liquid system has been applied to a poly(ethylene oxide) (PEO)/atactic poly(methyl methacrylate) (At-PMMA) mixture and found to afford a good prediction of miscibility for this system semi-quantitatively. A value of the contact energy term, X12, of -0.3 J cm-3 was calculated by using independent literature values of interaction parameter, x12, computed at about 80°C. The shape of the curve of x12 V*1 over temperature indicates that the PEO/At-PMMA mixture is miscible in the liquid state from 0 to 200°C. Extrapolation of x12 V*1 curve predicts a lower critical solution temperature (LCST) of about 350°C for this system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
