Abstract
In the presence of compunds having the functional groups such as quinone, hydroquinone and aromatic π-bonds on the surface of furnace black, bulk polymerization of vinyl acetate using 2, 2'-azobisiso butyronitrile (AIBN) or benzoyl peroxide (Bz2O2) as an initiator has been studied. The results show that hydroquinone and anthracene in the presence of Bz2O2 act as severe retarders. On the other hand, by the use of AIBN, it is found that p-quinone and anthracene act as mild inhibitors. These phenomena are similar to those of polymerization of monomers in the presence of furnace blacks using an initiator such as AIBN or Bz2O2.
Solution copolymerization of styrene and maleic anhydride has been also investigated in the presence of furnace black using Bz2O2 as an initiator at 30°C. The results indicate that the increases of the rate of agitation hinder polymerization reaction. Thus, it is suggested that the rate of combination of polymer radicals with the active sites formed on carbon black surface by the action of Bz2O2 is greatly accelerated by the agitation.
