The monomers with no methyl groups, which have a higher strain of 15 kcal/mol, reached near complete consumption by ROMP in 1 h. The DMONa monomer derived from 2,5-dimethylfuran and benzyne has a high RSE (25.1 kcal/mol) but is kinetically slower to polymerize than most other derivatives and 74% conversion was noted after 24 h (Figure ).