| abstract |
The present invention relates to a polymer comprising as part of its polymer backbone a moiety of Formula (II): n n n n n n n n n n where one of R 6 to R 10 represents A-O— and one of R 6 to R 10 represents —O—B and the remainder of R 6 to R 10 represent H, where A and B represent the remainder of the polymer backbone and may be the same or different. |