Application of the Jacobson-Stockmayer Theory to.Cationic Ring-Opening Polymerizations

1 Application of the Jacobson-Stockmayer Theory to Cationic Ring-opening Polymerizations 

The equilibrium distribution of cyclic oligomers in the cationic polymerization of heterocycles was studied systematically for two systems, the polymerization of siloxa-nes initiated with protonic acids and the polymerization of 1,3-dioxolane initiated with the BF3 Et20 complex5). Siloxanes are especially well suited for these studies as they are thermally stable and volatile. Thus, cyclic oligomers with n as high as 

Agreement with theory is also observed for the polymerization of cyclic siloxanes5). 

---