Copolymer, a manufacturing process therefor and a solution containing thereof

摘要

This invention discloses a copolymer comprising structural units represented by formulas (1) to (3):where R1 and R3 are each hydrogen or methyl and R2 is C1-C6 straight or branched unsubstituted alkyl or C1-C6 straight or branched substituted alkyl;wherein a, b and c are 0.05 to 0.7, 0.15 to 0.8 and 0.01 to 0.5, respectively and a+b+c=1.