Abstract
In this paper we describe a safe method for the determination of the structure of block copolymers in concentrated solution and in the dry state. This method involves the use of both low angle x-ray diffraction and electron microscopy. Using these two techniques, we have established the existence of five types of structures for block copolymers and shown that when the composition of the copolymer in the insoluble blocks increases one observes successively: a centred cubic structure, an hexagonal structure, a lamellar structure, an inverted hexagonal structure and an inverted centred cubic structure. We also describe the effect of the concentration of the solvent, the temperature and the polymerization of the solvent.
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