| abstract |
(57) [Summary] [Problem] It has a large elastic recovery property, has an appropriate elastic modulus, To provide a cyclic olefin ring-opened polymer having excellent transparency and heat resistance. SOLUTION: This is a polymer in which a straight chain having 2 or more carbon atoms and a hydrocarbon ring are alternately arranged, wherein the ratio of the straight chain having 3 or more carbon atoms to the total straight chain is 5 to 95% by weight, The ratio of the number of double bonds to the total number of carbon-carbon bonds in the linear chain is 50% or less, and the weight average molecular weight in terms of polystyrene by gel permeation chromatography is 1,000 to 1,000. 1,000,000 and the chloroform-insoluble content is 0.1. A cyclic olefin-based ring-opened polymer having a content of 1% by weight or less. |