Abstract

The Monte Carlo method has been used to calculate equilibrium characteristics of model flexible copolymer chains differing as to the combination of blocks, but having identical compositions and contour lengths. The number of units was in all 64, and the number of microblocks varied from 2 to 64. Energies of homo- and hetero-contacts between pairs of attracted units varied within wide limits. Given equality of the homo- and hetero-contact energies the chain was a homopolymer containing “tagged” sections of varying length, which made it possible to determine the hierarchy of interactions in the polymer coils, namely, the extent to which the characteristics of a particular chain section are influenced by other sections positioned at various distances away from the former section along the chain. Local densities of units have been calculated, i.e. the number of intrachain contacts between units of a particular sort and between units belonging to different components. The structure of multiblock copolymers in selective solvents has been analyzed, and the conclusion formed that the copolymers must contain a number of quasi-globular chain sections (blocks) alternating with uncoiled blocks. Conditions under which globularized blocks merge into a single tangled clot-like formation are examined.

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