反应详情

Concentrated solution polymerizations of three runs P1, P2 and P3, respectively, 2-vinyl fluorene (2VF), 2VF + phenyl vinyl ketone (PVK) and 2VF + phenyl isopropenyl ketone (PIPK) were carried out. In each case the procedure was the same: the monomer(s) was placed in a 6 mm diameter tube, approximately 0.25% azobisisobutyronitrile (AIBN) initiator was added in toluene so as to give a final monomer/solvent ratio of approximately 1/1. The tubes were then flushed with nitrogen and vacuum pumped five times before being left capped under nitrogen. After a variable raction time at 75° C., as shown in Table I the tubes were opened and the polymer was dissolved in toluene; dropwise addition of this solution to methyl alcohol gave a precipitate that was filtered and vacuum dried. Details are given in Table I.