Communication: Combination of hexa(chloromethyl)melamine (HCMM) and zinc ch
loride was found to be a multifunctional initiator system for the living ca
tionic polymerization of isobutyl vinyl ether. HCMM was synthesized by reac
tion of hexa(methoxymethyl)melamine and boron trichloride. Characterization
of the polymers by means of GPC and H-1 NMR showed that initiation was rap
id and quantitative and that the initiator is hexafunctional, leading to si
x-armed star-shaped polymers.