The polybutadiene composition includes {TAIL ~ a butadiene polymer} with {HEAD ~ a resilience index} greater than about 40 and a weight average molecular weight greater than about 200,000 
The polybutadiene composition includes { TAIL ~ a butadiene polymer } with { HEAD ~ a resilience index } greater than about 40 and a weight average molecular weight greater than about 200,000
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH