abstract |
The present invention is a graft copolymer obtained by graft-polymerizing 20 to 95 parts by weight of a monomer containing at least one selected from an aromatic vinyl monomer and a vinyl cyan monomer in 5 to 80 parts by weight of a rubbery polymer, , A microstructure having 21-30% of cis-1,4 bonds, 47-60% of trans-1,4 bonds, 16-23% of 1,2 vinyl bonds, and a degree of swelling of the rubbery polymer of 13-35 Gt; copolymer. ≪ / RTI > |