{HEAD ~ The modified polyolefin} is a branched graft copolymer and comprises {TAIL ~ a polyolefin} in the backbone with functional groups grafted thereto 
comprises
{ HEAD ~ The modified polyolefin } is a branched graft copolymer and comprises { TAIL ~ a polyolefin } in the backbone with functional groups grafted thereto
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH