ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
According to the Flory-Huggins theory for polymer blends, the polymerpolymer interaction parameter, χ23, must be positive for incompatible polymers. Previous studies of the incompatible ternary system chloroform-polystyrerne-butadiene rubber yielded negative values of χ23 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 χ23 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.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760312104
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