| 摘要 |
A norbornene-ester-based polymer and an optical material containing the norbornene-ester-based polymer are provided to increase a glass transition temperature, to improve thermal stability and light transparency and to minimize water absorption. A norbornene-ester-based polymer comprises a repeating unit of a C20-C80 norbornene-ester-based compound and is represented by the formula 1, wherein R1, R2 and R3 are identical or different one another and are H, a C1-C10 linear or branched alkyl group, or a C5-C12 cyclic alkyl group; at least one of R1, R2 and R3 is not H; R4 is a specific bridged hydrocarbon group; and n is an integer of 0 or more.
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