Such catalyst systems give both high productivity and {HEAD ~ low solubles} in {TAIL ~ the polymerization} of propylene 
in
Such catalyst systems give both high productivity and { HEAD ~ low solubles } in { TAIL ~ the polymerization } of propylene
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH