Polycarbonate composition and article comprising the same

A polycarbonate composition comprising:

• (a) a branched polycarbonate comprising a repeating unit represented by Chemical Formula 1 and a trivalent or tetravalent branched repeating unit connecting the plurality of repeating units represented by Chemical Formula 1 to each other;
• and
• (b) a copolycarbonate comprising an aromatic polycarbonate-based first repeating unit, and one or more aromatic polycarbonate-based second repeating units having siloxane bonds,
• wherein the second repeating unit comprises a repeating unit represented by Chemical Formula 4 and a repeating unit represented by Chemical Formula 5:
• in the Chemical Formula 1,
• R1, R2, R3 and R4 are each independently hydrogen, C1-10 alkyl, C1-10 alkoxy, or halogen, and
• Z is C1-10 alkylene unsubstituted or substituted with phenyl, C3-15 cycloalkylene unsubstituted or substituted with C1-10 alkyl, O, S, SO, SO2, or CO,
• in Chemical Formula 4,
• X1 is each independently C1-10 alkylene,
• R′5 is each independently hydrogen;
• C1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C1-10 alkoxy, or C6-20 aryl;
• halogen;
• C1-10 alkoxy;
• allyl;
• C1-10 haloalkyl;
• or C6-20 aryl, and
• n is an integer of 10 to 200,
• in Chemical Formula 5,
• X2 is each independently C1-10 alkylene,
• Y1 is each independently hydrogen, C1-6 alkyl, halogen, hydroxy, C1-6 alkoxy, or C6-20 aryl,
• R′6 is each independently hydrogen;
• C1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C1-10 alkoxy, or C6-20 aryl;
• halogen;
• C1-10 alkoxy;
• allyl;
• C1-10 haloalkyl;
• or C6-20 aryl, and
• m is an integer of 10 to 200, and
• wherein a weight ratio of the branched polycarbonate and the copolycarbonate is 20:80 to 40:60.