Synthesis of a polyolefin–polystyrene graft terpolymer

A graft polymer was prepared attaching the macromer, polystyrene end-capped with benzocyclobutene, to the carbon–carbon double bonds in poly-1-hexene-co-7-methyl-1,6-octadiene through thermally induced Diels–Alder reactions. The branches per backbone were determined by additive molecular weights and NMR spectroscopy to be 0.8, 1.6, and 2.7, for levels of polystyrene of 40, 60, and 80%, respectively. Grafting efficiencies were high, varying from 84–95%. © 1993 John Wiley & Sons, Inc.