Cationic Polymerization Induced by Tris-(p-bromophenyl) Amine Cation-Radical Salts

Abstract

Substituted triphenylamine cation radical salts having anions of the type SbF6-, PF6-, BF4 and SbCl6-, were prepared and used to initiate cationic polymerization of cyclohexene oxide (CHO), tetrahydrofuran (THF), and N-vinyl carbazole (NVC), thermally in dichloromethane at room temperature. Experimental results are presented to show the effects of salt counter ion, concentration, and polymerization conditions on the yield and the molecular weight of the obtained polymer. THF polymerization was enhanced by photolysis of the reaction mixture for short time. A general mechanism for the polymerization by cation-radical salts of substituted triphenylamine is proposed.

Synthesis and Applications of Polymeric Reagent p-Substituted Triphenylamine

“…In our early works with cation radical salts of psubstituted triphenylamine, phenothiazine and tetraphenylenediamine have been used to accomplish extremely efficient one electron transfer, to induce cationic polymerization reactions of cyclohexene oxide, THF and N-vinylcarbazole monomers [7][8][9]. and also in electrochemical modification of electrodes [10].…”