Thereafter, the reactor is charged with the polymerization medium and {HEAD ~ ingredients} in {TAIL ~ the usual manner} and the polymerization reaction commenced 
in
Thereafter , the reactor is charged with the polymerization medium and { HEAD ~ ingredients } in { TAIL ~ the usual manner } and the polymerization reaction commenced
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH