{HEAD ~ The selectively hydrogenated block copolymers} of this invention contain {TAIL ~ sufficient unsaturation} in the terminal D blocks so that they may be adequately vulcanized to provide near network perfection with the resulting superior mechanical properties at both room and elevated temperatures, while, as stated, the substantially complete lack of ethylenic unsaturation in the interior I blocks provides for a high degree of oxidative and thermal stability 
contain
{ HEAD ~ The selectively hydrogenated block copolymers } of this invention contain { TAIL ~ sufficient unsaturation } in the terminal D blocks so that they may be adequately vulcanized to provide near network perfection with the resulting superior mechanical properties at both room and elevated temperatures , while , as stated , the substantially complete lack of ethylenic unsaturation in the interior I blocks provides for a high degree of oxidative and thermal stability
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH