A polymerisation process which comprises contacting at least one polar acrylic type or maleimide monomer under polymerisation conditions with (i) a tetracoordinate organosilicon, organotin or organogermanium initiator having at least one initiating site and (ii) a co-catalyst which is a complex obtained by the interaction of a source of fluoride, bifluoride, cyanide or azide ions or a Lewis acid with a complexing agent.
展开▼
