The mechanism of formation of the disperse phase structure of polymer mixtures during transition from ternary (polymer-polymer-solvent) to binary (polymer-polymer) systems

Phase equilibria and phase structures of polymer blends

“…It is customary to assume that materials in which mutual dissolution or structure formation and establishment of the thermodynamic equilibrium are complicated by the glass transition of solutions, melts and blends, should be assigned to non-equilibrium materials. However, in a number of studies, 5,62,118 it was demonstrated that the structural ± morphological organisation of a sample is stabilised also in highly elastic and plastic states, if partial coefficients of translational diffusion of components, which are responsible for nucleation of a new phase and nucleus growth, amount to as much as 10 712 cm 2 s 71 .…”

“…middle region of the phase diagram. 118 The structure formed in this region remains unchanged upon removal of the solvent and going to a binary system. Such materials are characterised by several types of nonequilibrium: first, the deviation of the compositions of co-existing phases of particular composites from equilibrium values (see Fig.…”

“…Figure 37. Diagram of phase and physical states118 for the PVC ± PMMA ± THF system at 293 K.(1) Binodal, (2) line of stabilisation of the phase structure, (3) line of critical viscosity, (4) glass transition.…”