[lemma=miscibility] [□ | □]
[lemma=miscibility] [□=□ | □]
[lemma=miscibility] [□ & □ | □]
By comparison , regardless of methods of blend preparation , the miscibility was straightforwardly proven for the blends of PVPh with poly ( hexamethylene adipate ) ( PHA ) that possesses an average CH2 / CO ratio = 5.0 located on the center of window , and the phase behavior of PVPh / PHA blends is largely free of solvent interference . Many binary systems exhibit miscibility gaps in the liquid state . If it is assumed that miscibility is determined by the enthalpy of mixing , that the enthalpy of mixing is dominated by the local interactions between segments of the polymer chains , and furthermore that the volume change on mixing an be ignored , then polymer miscibility can be estimated from interaction energies calculated from molecular mechanics studies on pairs of small polymer fragments . Even when miscibility is not reached , the mass transfer mechanisms that occur between oil and gas phases lead to low IFT-values , when compared to waterflooding . Although not compatible with many of the elastomers or lubricants used with R-12 , it provided the single-fluid solution , and the issues of compatibility and miscibility were addressed by selecting alternative elastomers and lubricants , respectively . Refrigerant-lubricant mixtures , which are likely to have strong asymmetry , can show complex phase behaviour such as closed miscibility gaps , open miscibility gaps , liquid-liquid-vapour equilibrium , and even barotropic phenomena ( density inversions ) . IFT tends toward zero when miscibility is reached , which means that the oil recovery can be total in the swept area . Field or laboratory observations of miscibility gaps , spinodal gaps , critical mixing points or distribution coefficients can be used to estimate solid-solution excess-free-energies , when experimental measurements of thermodynamic equilibrium or stoichiometric saturation states are not available . Following a quench into the miscibility gap we observe an early stage in which ordering develops while the composition remains almost uniform . An exhaustive review of compositional and thermal extents of miscibility gaps in 61 binary silicate , borate and germanate systems permits identification of four groups of cations exhibiting different immiscibility behaviors . There is a minimum congruent melting point and a miscibility gap in the solid phase . A model has been developed to describe the microstructure evolution in the atomized droplets during a cooling through the metastable miscibility gap . The CV process greatly complicates the accurate estimation of MMP in that miscibility is developed not at the leading edge ( condensing region ) or trailing edge ( vaporizing region ) of the displacement , but is developed in between the condensing and vaporizing regions . It is possible by choosing various composition paths as miscibility is achieved to exercise some control over the actual displacement mechanism .