摘要:
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.
摘要:
A novel norbornene derivative represented by the following general formula (1m). The norbornene derivative is subjected to ring−opening polymerization or subjected to ring−opening polymerization and subsequently to hydrogenation. Thus, a ring−opening polymerization polymer or a product of hydrogenation thereof can be obtained which can especially have significantly reduced birefringence. (1m) [In the formula, at least one of R 1 to R 4 is a group selected between an aromatic−ring−containing group represented by the following general formula (1−1) and an aromatic−ring−containing group represented by the general formula (1−2): [wherein one of R A , R B , and Z is a group represented by the formula −C(O)O−].
摘要:
A thermoplastic resin composition which is inhibited from suffering phase separation and readily gives an optical film having excellent transparency; an optical film comprising the composition as a major ingredient; a retardation film which is a film formed by stretching the optical film, shows a positive wavelength dependence, and has a low photoelastic coefficient and transparency; and a process for producing the retardation film. The thermoplastic resin composition comprises (A) a cyclic-olefin polymer and (B) a vinyl polymer having a unit represented by the following general formula (II). (II) (III) (In the formula (II), at least one of R 1 to R 4 represents a group represented by the general formula (III), and the remainder of R 1 to R 4 , if any, and R 5 and R 6 each represents hydrogen, halogeno, a (substituted) hydrocarbon group optionally having a connecting group containing a heteroatom, or a polar group, provided that R 5 and R 6 may be bonded to each other to form a monocyclic or polycyclic group optionally having a heteroatom or may in cooperation represent a divalent hydrocarbon group; and Y represents a divalent hydrocarbon group.)
摘要:
A norbornene derivative characterized by being represented by the following general formula (Im). It is a novel norbornene derivative useful as a precursor monomer for producing a cycloolefin polymer which is excellent in transparency and heat resistance and reduced in water absorption and the birefringence and wavelength dispersion of which have been regulated at will. Also provided is a norbornene polymer produced by ring-opening (co)polymerization which is excellent in transparency and heat resistance, has high solubility in organic solvents, and has peculiar birefrengence and wavelength dependence.