{HEAD ~ A polymer} having {TAIL ~ the formula}: ##STR5## wherein: n is 1 or 2 
having
{ HEAD ~ A polymer } having { TAIL ~ the formula } : # # STR5 # # wherein : n is 1 or 2
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH