This work deals with the group transfer polymerization (GTP) of methyl methacrylate and some acrylates
with ethyl 3-ethoxy-3-trimethylsiloxyacrylate (ETSA) as initiator and Et4NHF2 as catalyst. Monodisperse polymer with predetermined molecular weights can be obtained by adjusting the monomer/initiator ratio. "Auto-acceleration" can be avoided by decreasing the catalyst concentration.