Miscibility of poly(2-fluoroethyl methacrylate) and poly(1,1,1,3,3,3-hexafluoroisopropyl methacrylate) with various polymethacrylates

Abstract

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 calorimetry and for lower critical solution temperature ( LCST) behaviour. Both P2FEMA and PHFPMA are miscible with poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA) and poly(tetrahydrofurfuryl methacrylate) (PTHFMA), but are immiscible with poly(n-propyl methacrylate) (PnPMA), 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. For PHFPMA, only PHFPMA/PEMA blends showed LCST behaviour. The miscibility behaviour of P2FEMA and PHFPMA is similar to that of poly(2-chloroethyl methacrylate).