SYSTEMS OF INTERMOLECULAR INTERACTIONS (P HYSICAL NETWORKS) IN OLIGOMERS OF THE ACRYL SERIES

The formation of associates in liquid oligomers of the acryl series, c ontaining various sets of associate-forming atomic groups (centers of localized intermolecular interactions), was studied by the spin-probe EPR technique. The results are interpreted on the basis of calculation s performed within the framework of the model of pairwise reversible i nteractions between the local centers, using a concept of physical net work. In terms of this model, the associate formation is considered as the appearance of a labile physical network with limited lifetimes ta u of the network nodes, With decreasing temperature, the network struc ture exhibits an evolution toward increasing lifetime and concentratio n of the nodes. The rate of the increase is determined by the set of l ocal centers contained in molecules of the initial oligomers.