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A semiempirical equation of combinatory entropy in ternary solutions containing two semiflexible polymers and flexible and semiflexible polymers in solvent has been derived, based on a previous equation for a binary polymer solution. The partial entropy of mixing for solvent, ASu.o, in the ternary system polymer (1)-polymer (2)-solvent (0) is expressed by: ASM.o/k = - In ~bo + a - 1 + ln[a/(a + b)] + b + k 1~ b2l ln{[r~- 1 + k~(1 - ~b0 ]/(a + b)} + kE~b 2 In{Jr 2 ' + k2(1 -- ~2)]/(a + b)} where a = ~b o +(t~l/rl)+(~P2/r2), b = kN51(1 - ~bl)+ k2~2(1 -t~2 ), ~b i is the volume fraction of component i, and ki is a constant characterizing the flexibility of polymer, for example ki = 0 for a flexible polymer and k i > 0 for a semiflexible polymer. Values of partial entropy of mixing for polymers, ASM,~, are evaluated in the ternary solution of two polymers with different flexibilities in solvent. The combinatory entropy in a binary polymer-polymer system is also discussed.

Посилання на статтю:

Correlation between the combinatory entropy of polymer and ideal liquid solutions: 2. Ternary polymer-polymer-solvent and binary polymer-polymer systems / Susumu Saeki // Polymer. – 1993. – Vol 34. – P. 4118-4122.

Correlation between the combinatory entropy of polymer and ideal liquid solutions: 2. Ternary polymer-polymer-solvent and binary polymer-polymer systems - Завантажити.