LIVING FREE-RADICAL POLYMERIZATION OF MACROMONOMERS - PREPARATION OF WELL-DEFINED GRAFT-COPOLYMERS

Well defined graft copolymers have been synthesized by a nitroxide-med iated ''living'' free radical process using pre-formed macromonomers. Analysis of the graft systems revealed that the macromonomer was effic iently incorporated into the polymeric backbone to give block copolyme rs of controlled molecular weight and narrow polydispersities. An adde d benefit of the ''living'' free radical process is that macromonomers , such as polylactide or polycaprolactone, which contain reactive func tional groups can be used to form novel graft systems using this appro ach. Functionalized monomers or polymeric initiators were also used in the copolymerization mixture to give graft systems with a variety of functional groups attached to the backbone.