The interfacial contribution, which is most important in the rheology of blends, is calculated from a simplified co-continuous structure.
The location of the wetting transition in symmetric polymer blends is calculated as a function of the degree of incompatibility and the difference in surface energy between the pure components, using mean-field (square-gradient) theory, coupled with a lattice model for the bare surface energy.
The individual reaction degrees of components of ternary blends are calculated from the hydration model.
Interaction parameter for the above miscible blends was calculated using established semi-empirical relationships.
Gibbs free energy of mixing (ΔGmix) values for selected blends are calculated using the BLENDS module of Cerius2.
Different target properties of the surrogate blends for example, Reid vapor pressure (RVP), dynamic viscosity, density, Research octane number (RON) and liquid-liquid miscibility of the surrogate blends) were calculated.
The binary interaction energies involved in the miscible blends were calculated from the phase boundaries using the lattice-fluid theory combined with binary interaction model.
From the measured crystallinity and specific heat increment at Tg, the Xr of PEEK in the PEEK PAr blends was calculated and found to be 0.31, 0.36, and 0.39 for the pure PEEK, 5 5, and 4 6 PEEK PAr blends, respectively.
The change of γ against volume fraction of P VDF-HFA) for P VDF-HFA-Hfor blends was calculated using thermodynamic theory on γ of miscible PEA/P VDF-HFAs PEA/P VDF-HFAKammer.
From the measured degree of crystallinity (Xc) and specific heat increment (ΔCp) at Tg, the rigid amorphous fraction (Xr) for the semicrystalline PEEK-PEI blends was calculated and found to be 0.117 0.358 with cooling rates in d.s.c.s.c
