| abstract |
A copolymer includes a fumaronitrile residue represented by following General Formula I and an aromatic vinyl monomer residue represented by following General Formula II: n nwherein, in General-Formula II, R 1 is a hydrogen atom, a methyl-group or a phenyl-group, and R 2 is a hydrogen atom or a substituted or unsubstituted aryl-group having 6 to 12 carbon atoms, and each of R 3 , R 4 , R 5 , R 6 and R 7 independently represents a hydrogen atom, a halogen atom, a hydroxy-group, an alkoxy-group having 1 to 4 carbon atoms, an acyloxy-group having 2 to 5 carbon atoms, a cyanomethyl-group, or an alkyl-group having 1 to 8 carbon atoms, and at least two of R 2 , R 3 and R 4 may be bonded to form a ring, and at least two of arbitrary substituents of R 3 , R 4 , R 5 , R 6 and R 7 may be bonded to form a ring. |