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Information × Registration Number 0119U102371, ( 0220U101241  0221U104061  ) R & D request Title Influence of polydispersity and porous media on phase behavior of molecular systems Head Hvozd Taras V., Кандидат фізико-математичних наук Registration Date 05-07-2019 Organization Institute of Condensed Matter Physics of the National Academy of Sciences of Ukraine popup.description1 Study of phase behavior of polydisperse polymeric systems in solvents and nematic fluids in porous media is the purpose of this work. The phase behavior of such systems depends on many different factors. In this work the main attention is devoted to study the influence of polydispersity, porous media, association, type of solvenent, shape of particles on phase behavior of molecular systems. In the first part, attention is devoted to the study of phase behavior ‘vapour-liquid’ , ‘liquid-liquid’ and fractionation effects of olydisperse polymers in different solvents. According to experimental results, depending on solvent, sush systems have rich phase behavior. The associativity of the solvent also has a very strong effect on the effects fractionation between phases. On the basis of generalization and application of Wertheim’s thermodynamic perturbation theory,within the framework of continuous thermodynamics, explanation and reproduction of experimental data is planned. The second part of the work is devoted to the study of phase equilibrium ‘vapour-liquid-isotropic phase-nematic phase’ of nematic fluid, which is represented by sphero cylinders with an additional attractive anisotropic interaction in a porous medium. In such a system can occur phase transition from isotropic to nematic phase. At the same time, the orientation ordering can occur both due to the shape of the particles and attractive anisotropic interactions between particles. In the framework of the scaled particle theory, explanation and reproduction of available experimental phase diagrams of the model in the bulk case, as well as generalization of this theory for studying the effect of a disordered porous medium on the phase behavior of such modelsis planned. popup.nrat_date 2024-12-10 Close