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Homopolymers of a bis-trifluorocarbinol substituted norbornene (1) (α,α-bis(trifluoromethyl)bicyclo[2.2.1]hept-5-ene-2-ethanol or HFANB) were produced using a palladium catalyst and hydrogen as a chain transfer agent to control molecular weight. As the hydrogen pressure increased, the molecular weight of poly(1) decreased. Spectroscopic analysis of these polymers by 1H NMR and MALDI-TOF MS confirmed that the hydrogen chain transfer agent generated hydrogen-terminated vinyl addition homopolymers of 1. The optical density of these polymers is extremely low at 193 nm and is independent of molecular weight.

Optical Density at 193nm of Vinyl Addition Poly(norbornene) Made Using Hydrogen as a Chain Transfer Agent