Abstract
Shiomi et al. showed from their experimental results that characteristic parameters depend nonlinearly on concentration, and that the size difference between segment and solvent should be reflected by the Flory theory. Their effects are examined in the present report in terms of the solution properties of the PDMS–n-alkane system. The concentration dependence of v* was as expected from Shiomi et al.’s theory, but deviations from additivity appeared in P*, T*, v and P*vsp*/T* (or external degree of freedom). The concentration dependence of χ was overestimated by this modified Flory theory as also by the original Flory theory.
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