Stability of Ordered Phases in Diblock Copolymer Melts

The stability of the diblock copolymer ordered phases is investigated by means of a novel theory of anisotropic composition fluctuations. The analogy between a polymer chain in a periodic structure and an electron in a crystalline solid is exploited in the development of the theory. This theory allows the calculation of the spinodal lines, the most unstable modes, and the scattering functions of the ordered phases. The one-phase regions of the …