{HEAD ~ The starting polymers} are preferably copolymers of ethylene and {TAIL ~ vinyl acetate} having stiffness less than about 20,000 psi 
{ HEAD ~ The starting polymers } are preferably copolymers of ethylene and { TAIL ~ vinyl acetate } having stiffness less than about 20,000 psi
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH