ABSTRACT
Copolymer systems based on blocks that behave in a coillike fashion (including di-and triblock copolymers) have been widely studied (Chapter 6). Coil-coil multiblock systems built of incompatible coil segments have been found to exist in a wide range of microphase separated supramolecular structures such as spheres, cylinders, double diamond (DD), double gyroid (DG), and lamella. Their phase behavior mostly results from the packing constraints imposed by the connectivity of each block and by the mutual repulsion of the dissimilar blocks. Phase separation and therefore the resulting stable morphology in diblock systems is greatly influenced by the total degree of polymerization (N NA NB), the Flory-Huggins χ parameter, and the composition expressed by volume fractions fA, fB, . . . .
