Concentration Dependence of Interaction Parameters

The Flory-Huggins interaction parameter % = ( —2)B/(k70, and % seems to be independent of However, from experiments (Flory 1953), % is found to vary with (j)2. For the sake of convenience, we use 

In 1971, Koningsveld and Kleijens made the first-order correction (Koningsveld 

But this expression appears not enough precise in comparison to experimental results. 

In 1988, Bawendi and Freed considered the free-volume contribution, and made the second-order correction (Bawendi and Freed 1988), as given by 

In principle, the expansion can be two dimensional in addition with respect to Mq, and both go to higher order corrections. 

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Figure 7.8. Concentration dependence of interaction parameter for PS-PBMA (a) and PMMA-PBMA (b) alloys 1-without filler, 2-with filler (calculation according to the first method), 3-calculation according to the second method. [Adapted by permission from Y. S. Lipatov in Controlled Interphases in Composite Materials, Ed. Ishida, Elsevier, Amsterdam, 1990, p. 594]...

Huang, J.-C. (2004) Concentration dependency of interaction parameter between PVC and plasticizers using inverse gas chromatography. J. Appl. Polym. Sci.,... 

Table 3 Coefficients of temperature and concentration dependence of interaction parameter...

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