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