NOVELTY - A synthetic polymer composition contains polymer backbone comprising structural units derived from styrene or vinyl ether and monomer chosen from acrylic acid, acrylic anhydride, acrylamide, acrylate, methacrylate, methacrylamide, methyl-methacrylate, fumaric acid, fumaric anhydride, maleic acid and/or maleic anhydride, and side chain moiety attached to the repeating in the polymer backbone. The side chain moiety has molecular structure containing carbon-carbon double bonds. The pi - electrons in the carbon-carbon double bonds are conjugated to form an aromatic species.    USE - Synthetic polymer composition is used for dispersing single walled carbon nanotubes (claimed) used in opto electronic devices such as light emitting diodes, light emitting transistors, photo-detecting diodes and transistors, electrochemical electrodes, photo electrochemical solar cells, solar fuel production and solar hydrogen production.    ADVANTAGE - The repeating units in the polymeric backbone have favorable chemical compatibility with the medium for dispersing single walled carbon nanotubes.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for synthetic polymer and its salts, having repeating unit of formula: -((X-Y')(n-m)-(X-Y'-(Z))m)-.    X=unit derived from monomer capable of undergoing polymerization;    Y'=unit derived from monomer capable of undergoing polymerization and contains electrophilic functionalities capable of reacting with nucleophilic functionalities on Z, preferably units derived from monomer capable of undergoing reversible addition-fragmentation chain transfer (RAFT) polymerization;and    Z=side chain of terminal moiety containing nucleophilic functionalities and having extended aromatic structures exhibiting graphene-like chemical properties resembling chemical properties of single walled carbon nanotube.    The group Y' contains acid or acid anhydride functionalities and Z is derived from an aromatic hydrocarbon and contains amine functionalities.