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