Quasiliving Carbocationic Polymerization. V. Quasiliving Polymerization of lndene

Abstract

Abstract Quasiliving polymerization of indene, i.e., an increase of the molecular weight of polyindenes with the cumulative amount of consumed monomer, has been demonstrated using the “H2O”/ BCl3, 2-chloroindene/BCl, “H2O”/TiCl4, 2-chloroindene/TiCl4, and cumyl chloride/TiCl4 initiating systems in CH2Cl2 solvent at -50°C. However, chain transfer operates in every system investigated, and sets a limit to DP n,max. The efficiency of the 2-chloroindene and cumyl chloride initiators is very low. The behavior of BCl3 and TiCl4 coinitiators on the polymerization has also been investigated.