In 1825 Michael Faraday isolated a sweet-smelling chemical that he dubbed bi-carburet of hydrogen. That molecule, better known as benzene, is perhaps the most famous molecular ring in chemistry.

The synthesis and photo-polymerization of hyperbranched polyesters (HBPEs) containing terminal methacryloyl groups (HBPE-MA) were examined. Polycondensations of 1,4-bis (chloromethyl)benzene with ...