sentences:  Two mechanisms were proposed for the sphere-to-rod transitions of block copolymer micelles, in which the micellar growth can occur by (A) fusion/fragmentation of micelles or (B) concomitant fusion/fragmentation of micelles and unimer exchange, followed by smoothing of the rod-like structures.With higher increments of the temperature and/or concentration, other phenomena can occur such as the formation of highly ordered mesophases (cubic, hexagonal and lamellar).Eventually, a complete dehydration of the polyoxypropylene blocks and the collapse of the polyoxyethylene chains will lead to clouding and/or macroscopic phase separation.