Preferably, the polymer has {HEAD ~ a molecular weight} in the range of {TAIL ~ 100 Da} to 800 kDa 
Preferably , the polymer has { HEAD ~ a molecular weight } in the range of { TAIL ~ 100 Da } to 800 kDa
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH