es a polycarbonate copolymer (A) having structural units represented by the following general formulas (1) and (2): where R1 and R3 are each independently an alkyl group, an alkoxy group, a nitro group or a halogen atom; R2 is a hydrogen atom or a methyl group; k and 1 are each independently an integer of 0-3; m and n are each independently an integer of 0-20, provided that at least one of m and n