Gas chromatographic study of the effect of fillers on thermodynamics of polymer-solvent interaction

Nesterov, A.Ye.; Lipatov, Yu.S.

doi:10.1016/0032-3950(75)90157-4

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…At 44 °C, a temperature well above the T t of E3 ( T t = 37 °C at ϕ = 0.1), the incipient stages of a phase transition occur homogeneously throughout the droplets; this rapid and simultaneous formation of protein-rich mesoscopic domains suggests demixing through spinodal decomposition 1,26 . As time proceeds, the clusters of concentrated phase coalesce with one another and grow in size until coarsening is complete, a phenomenon well described for phase-separating mixtures 1,27 . After coarsening, each emulsion microdrop exhibits a monodisperse spherical core–shell arrangement in which the dark core is a dense protein-rich coacervate and the light shell is a protein-poor phase (Fig.…”

Section: Resultsmentioning

confidence: 86%

Programming molecular self-assembly of intrinsically disordered proteins containing sequences of low complexity

et al. 2017

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Dynamic protein-rich intracellular structures that contain phase-separated intrinsically disordered proteins (IDPs) composed of sequences of low complexity (SLC) have been shown to serve a variety of important cellular functions, which include signalling, compartmentalization and stabilization. However, our understanding of these structures and our ability to synthesize models of them have been limited. We present design rules for IDPs possessing SLCs that phase separate into diverse assemblies within droplet microenvironments. Using theoretical analyses, we interpret the phase behaviour of archetypal IDP sequences and demonstrate the rational design of a vast library of multicomponent protein-rich structures that ranges from uniform nano-, meso- and microscale puncta (distinct protein droplets) to multilayered orthogonally phase-separated granular structures. The ability to predict and program IDP-rich assemblies in this fashion offers new insights into (1) genetic-to-molecular-to-macroscale relationships that encode hierarchical IDP assemblies, (2) design rules of such assemblies in cell biology and (3) molecular-level engineering of self-assembled recombinant IDP-rich materials.

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Section: Resultsmentioning

confidence: 86%

Programming molecular self-assembly of intrinsically disordered proteins containing sequences of low complexity

et al. 2017

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“…It is known that at the polymer-solid interface a fairly thick interphase or boundary layer appears, where the polymer properties are different from properties in the bulk [4,7,8]. These data alone are sufficient to conclude that conformations of polymer chains in the boundary layer and the conditions of interaction between different chains should be changed as well as compared with the same characteristics in the bulk.…”

Section: Influence Of the Adsorption Layer's Thickness And Surface Namentioning

confidence: 96%

“…As a result of retarded relaxation the polymer density, the degree of crystallinity and other characteristics including the thermodynamic interaction parameter Zi2 (polymer-solvent) [2,4] are changed. The transition of macromolecules into the boundary layers and the adsorption at the polymer-solid interface increase the thermodynamic stability of the filled polymeCs (AG < 0).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic stability of colloid polymer-polymer systems

Lipatov

1986

Colloid & Polymer Sci

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“…To compare various nonequilibrium states of IPN we can experimentally estimate the value (χΑΒ)βχρ. Various methods for the determination of χΑΒ are described else where (19). Now let us consider IPNs separated into two phases.…”

Section: Thermodynamic Description Of Nonequilibrium Multiphase Strucmentioning

confidence: 99%

Equilibrium and Nonequilibrium Microphase Structures of Interpenetrating Polymer Networks

Lipatov

1994

Interpenetrating Polymer Networks

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Formulation of a new approach to the structure of interpenetrating polymer networks (IPNs) is the objective of this review of the author's experimental works. As a whole, IPNs are not thermodynamically equilibrium systems because, in the course of chemical reactions leading to gelation, simultaneous phase separation proceeds due to increased thermodynamic immiscibility. However, the phases that evolve preserve the inherent structure of the state of mixing at an earlier stage of the reaction, before the onset of phase separation. Thus, the IPN is considered to be in a state of quasi-equilibrium with the molecular level of mixing. As a consequence, the nonequilibrium microphase structure of the IPN is described as a microheterogeneous system with a lack of molecular mixing of the two constituent networks throughout the bulk, but with a limited level of forced molecular mixing in each of the phases. PROPERTIES OF INTERPENETRATING POLYMER NETWORKS (IPNs) dependOn both the thermodynamic miscibility of the constituent networks and the kinetic conditions of the cross-linking reaction. The principal work on IPNs has been done by Sperling (I) and Frisch et al. (2). Research has established that IPNs have a complex structure and morphology and frequendy exhibit dual-phase continuity (3). Thermodynamic considerations have yielded equa-

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Gas chromatographic study of the effect of fillers on thermodynamics of polymer-solvent interaction

Cited by 4 publications

References 2 publications

Programming molecular self-assembly of intrinsically disordered proteins containing sequences of low complexity

Programming molecular self-assembly of intrinsically disordered proteins containing sequences of low complexity

Thermodynamic stability of colloid polymer-polymer systems

Equilibrium and Nonequilibrium Microphase Structures of Interpenetrating Polymer Networks

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