Investigation of miscibility by spectroscopic methods IV. How far is poly(vinyl chloride) miscible with s‐poly(methyl methacrylate) and poly(styrene‐co‐acrylonitrile)? An answer from nonradiative energy transfer

Abstract

Miscibility of PVC with s.PMMA and SAN, respectively, has been investigated by nonradiative energy transfer. Blended by using a common solvent, the two polymer pairs are not homogeneous at a molecular level. They are likely to contain heterogeneities of a few nanometers depending on blend composition. At a comparable number average molecular weight, but a different polydispersity, SAN is seemingly less miscible with PVC than s.PMMA. That this behavior is of enthalpic or entropic origin, or mainly due to the method of mixing, cannot be settled so far.