The formation of interpolymer complexes and hydrophilic associates of poly(acrylic acid) and non-ionic copolymers based on 2-hydroxyethylacrylate in aqueous solutions

Abstract

It is shown that the reaction between poly(acrylic acid) and a non‐ionic polymer may give two different products. One of them is the well‐known interpolymer complex stabilized by hydrogen bonds, and the other belongs to a relatively new class of compounds named hydrophilic interpolymer associates. Networks occurring in the dynamic mode of formation and destruction of hydrogen bond linkages represent the structure of the hydrophilic associates; a single molecule of polyacid may be linked with two or more molecules of non‐ionic polymer in such associates. The result of the reaction under consideration strongly depends on the ratio of volumes of swollen coils of ionogenic and electrically neutral macromolecules. Classical interpolymer complexes cannot be formed at a high degree of swelling of polyacid coils, which takes place at high pH values. In contrast, hydrophilic associates are formed under such conditions. © 2013 Society of Chemical Industry

The design of viscometer with smartphone controlling

“…The nature of changes of viscosity within a change in thermodynamic variables carries extensive information about intermolecular interactions [14], [15], and about the nature of changes in the state of macromolecules in solution [16]- [18]. Especially clearly the information content of viscometric measurements can be demonstrated by starting from the example of liquid media in which forming hydrophilic interpolymer associates (HIA) [19]. The study of HIA, in turn, is of considerable interest, including from the point of view of establishing the evolution mechanisms which preceding biological one.…”

“…HIA is an object that occupies an intermediate position between classical interpolymer complexes (the products of reaction between two types of polymers), cross-linked polymer networks (hydrogels), and the non-interacting macromolecules solutions [19]. HIA are networks that exist in a dynamic mode, i.e., the bonds between macromolecules (for example, hydrogen) are constantly formed and destroyed again [19], [20].…”

“…HIA is an object that occupies an intermediate position between classical interpolymer complexes (the products of reaction between two types of polymers), cross-linked polymer networks (hydrogels), and the non-interacting macromolecules solutions [19]. HIA are networks that exist in a dynamic mode, i.e., the bonds between macromolecules (for example, hydrogen) are constantly formed and destroyed again [19], [20]. For studying systems of this type, the viscometric measurements are one of the most convenient: the average number of bonds between macromolecules, which characterizes the dynamic network, obviously affects on the viscosity of the medium in which the HIA is formed.…”

Thermoresponsive UCST‐Type Behavior of Interpolymer Complexes of Poly(ethylene glycol) and Poly(poly(ethylene glycol) methacrylate) Brushes with Poly(acrylic acid) in Isopropanol

“…One of the most studied interpolymer complex forming pairs is poly(ethylene glycol) and poly(acrylic acid). The most recent theory of supramolecular systems based on this polymer pair in aqueous environment is reported by Suleimenov et al They claim the formation of soluble interpolymer complexes which can be imagined as extended, partially ionized polyacid coils dynamically coupled with polyacceptor coils via hydrogen bonds in a given pH range. This pH range is between two pH regimes.…”

Phase Transitions in Communication Networks with Limited Elements of Valence

“…An example of this is the formation of hydrophilic interpolymer associates (HIA, [10], [11]). This little-studied class of interpolymer reaction product is a network which exists in the dynamic mode, the bonds between the elements of which they are destroyed and formed again, being in dynamic equilibrium.…”