The presence of units derived from {HEAD ~ polyethylene glycol} within the polymer chain has been found to lead to {TAIL ~ such intrinsic viscosity reduction} within the dye bath 
The presence of units derived from { HEAD ~ polyethylene glycol } within the polymer chain has been found to lead to { TAIL ~ such intrinsic viscosity reduction } within the dye bath
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH