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Application of the Flory‐Huggins theory to the system chloroform‐polystyrene‐butadiene rubber
Author(s) -
Geveke D. J.,
Danner R. P.
Publication year - 1991
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760312104
Subject(s) - flory–huggins solution theory , chloroform , ternary operation , polystyrene , natural rubber , thermodynamics , materials science , polymer , solvent , polymer chemistry , chemistry , organic chemistry , physics , composite material , computer science , programming language
According to the Flory‐Huggins theory for polymer blends, the polymerpolymer interaction parameter, χ 23 , must be positive for incompatible polymers. Previous studies of the incompatible ternary system chloroform‐polystyrerne‐butadiene rubber yielded negative values of χ 23 using a solution method based on the Flory‐Huggins theory with the chloroform‐butadiene rubber interaction parameter used as input. An alternate solution method using the chloroform‐polystyrene interaction parameter as input has been used to obtain positive values of χ 23 for this incompatible system. This variation in results indicates that the interaction parameters obtained using the Flory‐Huggins theory are not physically meaningful. They are, however, useful as correlating parameters. Both sets of results, although quite different, are shown to correlate the experimental data identically well. In addition, the appropriate equations are presented for the case where one of the solvent‐polymer interaction parameters is concentration dependent.