“…Conventionally, aromatic C 9 HR is a low-molecular weight thermoplastic copolymer made from the cationic polymerization of the aromatic C 8 , C 9 , and/or C 10 unsaturated monomers, fractions derived from ethylene steam crackers at high temperature and the range of molecular weight is from 300 to 3000 Da. ,, Typically, a mixture of cationically polymerizable monomers (19–23 wt %) and aromatics (benzene, toluene, and xylene (BTX), 42–48 wt %) and other alkyl-substituted derivatives of these components is found in this cracked petroleum distillate fraction. These monomer streams contain the nonpolymerizable components besides the reactive components such as ethylbenzene, xylene, ethyltoluene, cumene, methylindene, indane, naphthalene, and other similar species.…”