MISCIBILITY OF POLY(2-FLUOROETHYL METHACRYLATE) AND POLY(1,1,1,3,3,3-HEXAFLUOROISOPROPYL METHACRYLATE) WITH VARIOUS POLYMETHACRYLATES

The miscibility behaviour of poly(2-fluoroethyl methacrylate) (P2FEMA) and poly(1,1,1,3,3,3-hexafluoroisopropyl methacrylate) (PHFPMA) with various polymethacrylates was studied by differential scanning calorim etry and for lower critical solution temperature (LCST) behaviour. Bot h P2FEMA and PHFPMA are miscible with poly(methyl methacrylate) (PMMA) , poly(ethyl methacrylate) (PEMA) and poly(tetrahydrofurfuryl methacry late) (PTHFMA), but are immiscible with poly(n-propyl methacrylate) (P nPMA), poly(isopropyl methacrylate) (PiPMA), poly(n-butyl methacrylate ) (PnBMA) and poly(cyclohexyl methacrylate) (PCHMA). Phase separation could be induced by heating for blends of P2FEMA with PMMA and PEMA. F or PHFPMA, only PHFPMA/PEMA blends showed LCST behaviour. The miscibil ity behaviour of P2FEMA and PHFPMA is similar to that of poly(2-chloro ethyl methacrylate).