Abstract
AbstractThe Flory equation‐of‐state theory, as expressed by Patterson and co‐workers, has been applied to two miscible polymer blends: poly(vinyl chloride)/poly(ε‐caprolactone) and poly(methyl methacrylate)/poly(vinylidene chloride). For both blends, the variation of the polymer‐polymer interaction parameter, χ, as a function of composition, is mostly small and can be accounted for by the Flory theory. However, for poly(vinyl chloride)/poly(ε‐caprolactone) blends, at high poly(ε‐caprolactone content), the large variation of χ as a function of concentration can be explained by a variation of the surface‐to‐volume ratio of the polymers in the mixture with blend composition. The variations of the surface‐to‐volume ratios determined in this study agree with those reported in the literature using small‐angle x‐ray scattering.
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