Abstract
During the polymerization of N-vinylcarbazole (NVC) by Co(II)-13X the resultant polymer (¯Mn=6000) is soluble in benzene or toluene but partly soluble in methylethyl ketone (MEK). To ascertain whether the MEK insolubility is due to polymer tacticity, the polymer has been further characterized by13C NMR analysis. The atactic structure of polyN-vinylcarbazole (PNVC) initiated by Co(II) has been established from a comparison of methine carbon ( ) peaks with the same for a cationic PNVC(BF3/Et2O, isotactic) and radical PNVC (AIBN, atactic).
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