| abstract |
The present invention relates to a block copolymer comprising: at least a bloc A having a T g >−60° C., preferably a T g >0° C., and most preferably >60°B comprising at least one photoactive monomer having a photoisomerable chromophore. The photoactive monomer having the formula (I), wherein X is H or CH 3 —; G is —O—C(═O)—, —C(═O)—O—, a phenyl group, substituted or un-substituted, or —NR—C(═O)—, NR being linked to L and R is H or a C 1-C 10 alkyl group; L is a spacer group; CR is a photoisomerable chromophore. The block copolymer provides a 3D optical memory. The invention also relates to this optical 3D memory. |