Miscibility of polymethacrylates with poly(p-methylstyrene-co-acrylonitrile)

Abstract

The miscibility of five polymethacrylates with poly(p-methylstyrene-co-acrylonitrile) (pMSAN) has been studied. Poly(methyl methacrylate), poly(ethyl methacrylate), poly(n-propyl methacrylate) and poly(n-butyl methacrylate) are miscible with pMSAN over certain copolymer composition ranges but poly(isopropyl methacrylate) is immiscible with pMSAN. The phase behaviour of polymethacrylate/pMSAN blends is, in general, similar to that of the corresponding blends with poly(styrene-co-acrylontrile). Various segmental interaction parameters have been evaluated and compared with the corresponding parameters involving the styrene segment. © 1991.