| abstract |
A ring-opening polymerization polymer of cycloolefins characterized by comprising at least two kinds of structural units selected from the group consisting of a structural unit (1) represented by the following formula (1), a structural unit (2) represented by the following formula (2), and a structural unit (3) represented by the following formula (3). (1) (2) (3) The ring-opening polymerization polymer of cycloolefins can be easily produced and are excellent in transparency, heat resistance, solubility in organic solvents, strength, and processability. The refractive-index anisotropy, wavelength dispersion, and glass transition temperature can be easily controlled by adequately regulating the proportions of the units. |