adding a catalyst into {TAIL ~ the water} to polymerize the monomer in {HEAD ~ the micell} 
adding a catalyst into { TAIL ~ the water } to polymerize the monomer in { HEAD ~ the micell }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD