Studies on the polymerization of bifunctional monomers. X. Further studies on the cationic polymerization of o‐divinylbenzene

Cationic cyclopolymerization of o‐divinylbenzene was further investigated. The relationship between the cyclization constant (rc) and the amount of pendant double bonds present in polymer was derived statistically, without resort to the kinetic steady state approximation. When the catalyst and the solvent were varied, the influence of the solvent polarity on rc was small. However, different FRIEDEL‐CRAFTS catalysts gave widely varied rc values in the following order: magnified image This variation was correlated with the structure of the propagation ion‐pair.