| abstract |
The invention relates to a copolymer comprising a repeating unit (A), the repeating unit (A) comprising a repeating unit (B), the repeating unit (B) comprising at least one optional repeating unit (D), the repeating unit ( D) comprising an aryl group. In this copolymer, X 1 , X 2 , X 3 , and X 4 are independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkoxy, ester, ketone, amide and aryl groups and R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of H, Cl, F, CN, alkyl, alkoxy, alkylthio, ester, ketone and aryl. |