The viscosity of {HEAD ~ the second polymer} is not greater than {TAIL ~ about 10 percent} of the viscosity of the first polymer measured at 170° C 
The viscosity of { HEAD ~ the second polymer } is not greater than { TAIL ~ about 10 percent } of the viscosity of the first polymer measured at 170 ° C
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH