POLYMERS CONTAINING FLUORINATED KETONE GROUPS .3. SYNTHESIS OF STYRENE-P-VINYLTRIFLUOROACETOPHENONE CO-POLYMERS BY MODIFICATION OF POLYSTYRENE AND THE COPOLYMERIZATION OF MONOMERS

In the reported experiments, copolymers 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 % of trifluoroacetyl functionality could be attached to the polymer before the onset of crosslinking. Differential scanning calorimetry (DSC) was used to determine their T//g's. In addition, the reactivity ratios of styrene and VTFA were investigated. The reactivity ratios and Q and e values were r//1 equals 0. 30 plus or minus 0. 09 (styrene) and r//2 equals 1. 3 plus or minus 0. 3 (VTFA); Q//1 equals 1. 0 and e//1 equals minus 0. 8 (styrene); Q//2 equals 0. 44 and e//2 equals 1. 93 (VTFA).