Influence of the morphology on the translational and collective dynamics in ordered diblock copolymer melts

Diblock copolymers in the melt state form a variety of mesoscopically ordered morphologies, depending on their composition and on temperature. They can thus serve as a model system for studying the dynamics in different ordered morphologies with the disordered state as a reference state. In this review, the methods for studying the dynamics are compiled. The dynamics in the disordered, the lamellar, the gyroid, the hexagonal and the body-centred cubic phase are described with particular emphasis on the polymer self-diffusion as well as on the collective dynamics. The dimensionality of the morphology has a strong influence on the dynamics: the copolymer diffusion along the interfaces is anisotropic, in contrast to the isotropic disordered phase, and collective motions such as undulations of lamellar interfaces or fluctuation of the micellar distance in the body-centred cubic state become possible.