| abstract |
The present invention relates to a norbornene copolymer having excellent properties such as transparency, heat resistance, low absorption and electrical insulation, the copolymer comprising a monomer unit represented by formula (1) and formula (2) It has a number average molecular weight (Mn) of 300,000-2,000,000. (In the above general formula, R 1 represents an alkyl group having 1 to 10 carbon atoms; R 2 , R 3 and R 4 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.) |