| abstract |
The invention relates to a polymer comprising structural units of formula n n n n n n n n n n and formula n n n n n n n n n n whereinn R 1 , R 2 , R 5 and R 6 are independently hydrogen, a methyl group, or —COOH, only one of R 1 and R 2 or R 5 and R 6 is —COOH;n R 3 and R 7 are independently hydrogen, or a methyl group; n R 4 is —COOH, —CONH 2 or —OH, when R 4 is —OH, R 1 , R 2 and R 3 are respectively hydrogen; andn R 8 is —COO, —CONH, or —O—, when R 8 is —O—, R 5 , R 6 and R 7 are respectively hydrogen. n nn Methods for preparing and using the polymer are also described herein. |