Polymers containing fluorinated ketone groups. III. Synthesis of styrene/p‐vinyltrifluoroacetophenone copolymers by modification of polystyrene and the copolymerization of monomers

Abstract

AbstractCopolymers of styrene/p‐vinyltrifluoroacetophenone were prepared by two different reaction routes: (1) modification of polystyrene with trifluoroacetyl chloride and (2) copolymerization of styrene and p‐vinyltrifluoroacetophenone (VTFA). There appears to be a limit to the modification method because only a maximum content of 14.5 mole % trifluoroacetyl functionality could be attached to the polymer before the onset of crosslinking. Differential scanning calorimetry (DSC) was used to determine their Tg's. In addition, the reactivity ratios of styrene and VTFA were investigated. The reactivity ratios and Q and e values were r1 = 0.30 ± 0.09 (styrene) and r2 = 1.3 ± 0.3 (VTFA); Q1 = 1.0 and e1 = −0.8 (styrene); Q2 = 0.44 and e2 = 1.93 (VTFA).