Abstract
The paper discusses the complexity and ambiguity of interpretation of plotting binodals (for binary monomolecular polymer + low-molecular-weight liquid systems) or phase separation boundaries (those with a polymolecular polymer) by means of fixing a certain turbidity level when the configurative point moves from the single-phase range towards the phase separation one (the so-called cloud-point curve technique).
Highlights
State diagrams, or the phase diagrams of multicomponent systems, underlie modern materials science
The so-called cloud-point technique is most frequently applied for the phase analysis of polymeric systems, itconsists in determination of the temperature of the initial cloudiness of a solution, which is regarded as the temperature of phase separation (Tps)
It is principally impossible to fix crossing the binodal by fixing a common preset turbidity level when the configurative point is moving along the temperature axis at c = const from the single-phase range to the phase separation range in a certain interval of polymer concentrations by virtue of different degrees of remoteness of the solution of the given concentration from the critical concentration of the system and the critical retardation effect
Summary
The phase diagrams of multicomponent systems, underlie modern materials science This fundamental statement fully applies to polymer-containing (or polymeric) systems [1,2,3,4,5]. The so-called cloud-point technique is most frequently applied for the phase analysis of polymeric systems, it`consists in determination of the temperature of the initial cloudiness of a solution, which is regarded as the temperature of phase separation (Tps).
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