Poly(sec-butyl crotonate) (poly(SBC)) was prepared by anionic polymeri
zation. 1,1-Diphenylhexyllithium was found to be an effective initiato
r. Poly(SBC) showed the same optical properties as poly(methyl methacr
ylate) (poly(MMA)) but different features: poly(SBC) had a high glass
transition temperature (T-g) and very high extensibility below T-g, in
comparison to poly(MMA). Poly(SBC) can be expected to find applicatio
ns as an optical material having high flexibility and high service tem
perature.