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The study of the association behavior of the amphiphilic copolymers in solutions containing low molar compounds by means of computer simulations.
Šindelka, Karel ; Limpouchová, Zuzana (advisor) ; Slavíček, Petr (referee) ; Vondrášek, Jiří (referee)
Title: The study of the association behaviour of the amphiphilic copolymers in solutions containing low molar compounds by means of computer simulations. Author: Mgr. Karel Šindelka Department: Faculty of Science, Charles University Supervisor: Doc. Ing. Zuzana Limpouchová, Csc. Abstract This doctoral thesis focuses on the study of electrostatic self- and co-assembly in complex polymer solutions containing polyelectrolyte (PE) block copolymers together with surfactants, neutral homopolymers, or oppositely charged PEs using the dissipative particle dynamics (DPD). It was shown that the electro- static self-assembly depends not only on the cooperative interactions of oppo- sitely charged PE chains, but also on the amphiphilicity of PE species or on the polymer block compatibility, among other properties. PEs with incompatible blocks create well-defined core-shell structures, while large ill-defined crew-cut aggregates form from PEs with compatible blocks In non-stoichiometric mixtures of PEs with incompatible blocks, co-assembled nanoparticles are smaller than in stoichiometric mixtures and are charged. The destabilization of larger aggregates depends on how the PE charge surplus is introduced: the effect is strongest when the density of the surplus PE charge on the PE chains is increased and weakest when the...
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The study of the association behavior of the amphiphilic copolymers in solutions containing low molar compounds by means of computer simulations.
Šindelka, Karel
Title: The study of the association behaviour of the amphiphilic copolymers in solutions containing low molar compounds by means of computer simulations. Author: Mgr. Karel Šindelka Department: Faculty of Science, Charles University Supervisor: Doc. Ing. Zuzana Limpouchová, Csc. Abstract This doctoral thesis focuses on the study of electrostatic self- and co-assembly in complex polymer solutions containing polyelectrolyte (PE) block copolymers together with surfactants, neutral homopolymers, or oppositely charged PEs using the dissipative particle dynamics (DPD). It was shown that the electro- static self-assembly depends not only on the cooperative interactions of oppo- sitely charged PE chains, but also on the amphiphilicity of PE species or on the polymer block compatibility, among other properties. PEs with incompatible blocks create well-defined core-shell structures, while large ill-defined crew-cut aggregates form from PEs with compatible blocks In non-stoichiometric mixtures of PEs with incompatible blocks, co-assembled nanoparticles are smaller than in stoichiometric mixtures and are charged. The destabilization of larger aggregates depends on how the PE charge surplus is introduced: the effect is strongest when the density of the surplus PE charge on the PE chains is increased and weakest when the...
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The study of the association behavior of the amphiphilic copolymers in solutions containing low molar compounds by means of computer simulations.
Šindelka, Karel
Title: The study of the association behaviour of the amphiphilic copolymers in solutions containing low molar compounds by means of computer simulations. Author: Mgr. Karel Šindelka Department: Faculty of Science, Charles University Supervisor: Doc. Ing. Zuzana Limpouchová, Csc. Abstract This doctoral thesis focuses on the study of electrostatic self- and co-assembly in complex polymer solutions containing polyelectrolyte (PE) block copolymers together with surfactants, neutral homopolymers, or oppositely charged PEs using the dissipative particle dynamics (DPD). It was shown that the electro- static self-assembly depends not only on the cooperative interactions of oppo- sitely charged PE chains, but also on the amphiphilicity of PE species or on the polymer block compatibility, among other properties. PEs with incompatible blocks create well-defined core-shell structures, while large ill-defined crew-cut aggregates form from PEs with compatible blocks In non-stoichiometric mixtures of PEs with incompatible blocks, co-assembled nanoparticles are smaller than in stoichiometric mixtures and are charged. The destabilization of larger aggregates depends on how the PE charge surplus is introduced: the effect is strongest when the density of the surplus PE charge on the PE chains is increased and weakest when the...
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The study of the association behavior of the amphiphilic copolymers in solutions containing low molar compounds by means of computer simulations.
Šindelka, Karel ; Limpouchová, Zuzana (advisor) ; Slavíček, Petr (referee) ; Vondrášek, Jiří (referee)
Title: The study of the association behaviour of the amphiphilic copolymers in solutions containing low molar compounds by means of computer simulations. Author: Mgr. Karel Šindelka Department: Faculty of Science, Charles University Supervisor: Doc. Ing. Zuzana Limpouchová, Csc. Abstract This doctoral thesis focuses on the study of electrostatic self- and co-assembly in complex polymer solutions containing polyelectrolyte (PE) block copolymers together with surfactants, neutral homopolymers, or oppositely charged PEs using the dissipative particle dynamics (DPD). It was shown that the electro- static self-assembly depends not only on the cooperative interactions of oppo- sitely charged PE chains, but also on the amphiphilicity of PE species or on the polymer block compatibility, among other properties. PEs with incompatible blocks create well-defined core-shell structures, while large ill-defined crew-cut aggregates form from PEs with compatible blocks In non-stoichiometric mixtures of PEs with incompatible blocks, co-assembled nanoparticles are smaller than in stoichiometric mixtures and are charged. The destabilization of larger aggregates depends on how the PE charge surplus is introduced: the effect is strongest when the density of the surplus PE charge on the PE chains is increased and weakest when the...
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Conformational behavior of branched polymers
Wang, Xiu ; Limpouchová, Zuzana (advisor) ; Cifra, Peter (referee) ; Kolafa, Jiří (referee)
This PhD thesis is devoted to the study of the conformational behavior of branched polymers in confined volumes. This behavior depends not only on polymer architecture and composition but also on steric confinement and on interaction of polymer segments with the confining wall. Better understanding of complex entropy-to-enthalpy interplay can elucidate the mechanism of the chromatographic separation at the microscopic level. An unambiguous size-exclusion chromatography (SEC) analysis of mixtures containing different polymer architectures is difficult because the sizes of polymer coils, which determine the separation, depend not only on molar mass but also on the polymer architecture. Modern chromatographic methods combine the SEC with the interaction chromatography (IC). They exploit the fact that polymer interactions with pore walls, which are the prerequisite for efficient IC separation, depend strongly on polymer architecture. The knowledge of the conformational behavior of linear and branched polymers in confined volumes and of their interactions with confining medium enables to find optimum conditions either for enhancing or for suppressing the role of individual factors that influence the separation. We have shown that the complex entropy-to-enthalpy interplay in polymer solutions in confined...
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