Synthesis, characterization and associative properties of triblock and diblock perfluorinated poly(acrylamide)s

A triblock perfluorinated poly(acrylamide) was produced by polymerization o f acrylamide at 82 degrees C in acetonitrile using a diffunctional azo-deri vative initiator bearing fluorinated groups. The presence of triblock struc tures was revealed by GPC analyses by changing the nature of the solvent. F ractionation of a poly(acrylamide) sample allowed us to isolate the tribloc k fractions from the diblock ones. Polymerization with a small amount of in itiator led to a sample with few triblock structures compared to a polymeri zation with a large amount of initiator. It can be concluded from this that acrylamide rather gives disproportionation according to the literature and that triblock formation comes from primary radical termination.