2,3,4,5,6-Pentafluorostyrene (PFS) was copolymerized with beta-pinene (PIN) in bulk using benzoyl peroxide as the initiator at 70 degrees C. The reactivity ratios for PFS (r(PFS)) and PIN (r(PIN)) were determined by limiting each monomer conversion to approximately 10 mol % or less during 2 h of copolymerization and then plotting the composition data according to both the Fineman-Ross (r(1) = r(PFS) = 5.2, r(2) = r(PIN) = 0.070) and Kelen-Tudos (r(1) = r(PFS) = 5.0, r(2) = r(PIN) = 0.017) methods. The copolymers exhibited a single glass transition at 60-100 degrees C, static water contact angles higher than 95 degrees, and optical activity with negative specific rotations. (c) 2006 Wiley Periodicals, Inc.