Comparison of a Cell Theory with a Lattice Fluid Theory for Partial Miscibility of a Polymer Solution

Department of Chemistry, Duk Sung W omens University Seoul 132- 714, Korea (Received November 10, 2004) . , hole, free v olum e !" # $% . & van der Waals '() * Lennard-Jones 6-12 '() " + ,- '(). /0 123 $% . Flory 4-567 , Sanchez 8 Lacom be 9 , Dee 8 Walsch :; ?@A $% . B CD E Dee 8 Walsch , Mie(p,6) '(). 123 + , 9 , Lennard-Jones 6-12 '(). 123 + CF 9 . 23 LCST G4. / PS+PVME[(poly sty rene)+poly (viny l methyl ether)] HIJ K LM. NO3 PQR S3 /T% . U V +W XY Z V" /[\% . : , K LMABSTRACT. Many theories f or poly m eric liquids are based on the concepts of cell, hole, free volume or lattice etc.In the theories, van der Waals potential, L ennard-Jones 6-12 potential and their m odif ied potentials are comm only used.A n eqaution of satet theory of Flory & his coworkers, a cell theory of Dee a E = i HIJ. `a3 j XY :; 1k chain flexiblity 8 free volum e . lm Flory