Patent ID: 8420767

Claim:
A polymer represented by the following Formula 1: wherein R 1 to R 4 are independently hydrogen or —SO 3 R, wherein R is hydrogen, alkyl having 1 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, aryl having 6 to 18 carbon atoms, or acyl having 1 to 20 carbon atoms; Ar 1 is independently a substituent selected from the group consisting of the following Formula 5a, [Formula 5a] Ar 2 is a substituent selected from the group consisting of the following Formula 6a, Y is independently oxygen (O), sulfur (S), or a chemical bond; and n and m are a degree of polymerization for each repeating unit, wherein n is an integer from 10 to 99, and m is an integer from 1 to 100.