Each metalated particle thus prepared is {HEAD ~ a solid supported catalyst} that is stable for {TAIL ~ at least a month} or more under pressure in a refrigerated environment and is useful for gas phase anionic polymerization of anionically polymerizable monomers to yield a macro branched polymeric product 
is stable for
Each metalated particle thus prepared is { HEAD ~ a solid supported catalyst } that is stable for { TAIL ~ at least a month } or more under pressure in a refrigerated environment and is useful for gas phase anionic polymerization of anionically polymerizable monomers to yield a macro branched polymeric product
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH