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