polyacrylamide

Cross-linked polymer films based on polyvinyl alcohol and polyacrylamide have been prepared via radical cross-linking initiated by peroxide containing reactive copolymers. The influence of temperature, nature and concentration of cross-linking agents onto gel-fraction value and properties of polymer films has been studied. Obtained cross-linked polymer films are characterized by improved physico-mechanical properties that depend on the content of peroxide containing copolymer and on the presence of additional cross-linking agent.

The paper represents the results of the investigation of the formation of a polymeric matrix of hydrogel due to the structuring of polyacrylamide using its reactive polymeric derivative – poly-N-(hydroxymethyl) acrylamide. Research determined zones of optimum conditions of synthesis and characterized hydrogel depending on pH of media, the ratio between the concentration of prepolymers, and time of synthesis.

Polyacrylamide and its copolymers are widely used as flocculating agents for the separation of industrial suspensions. The formation of high molecular weight polymers depends on the content of various impurities present in the monomer. The article presents the scientific and practical information on the production of acrylamide by sulfuric acid method of hydration of nitrile acrylic acid in the form of an aqueous solution of different concentrations and a more modern heterogeneously catalytic method of hydration of acrylonitrile using as catalysts with variable valence.

Magnetic hydrogels form a class of soft materials with remote controllable properties that have attracted great attention due to their applications in biomedical engineering, including tissue engineering, drug delivery and release, enzyme immobilization and cancer therapy.

Today in the world deepened researches on the synthesis and study of theproperties of hydrogel materials are held due to their promising use in many fields,in particular in pharmaceutics, electronic devices and engineering, biomedicine,bioengineering. Physico-chemical properties of hydrogels, so the spheres of theirpossible use are determined by the nature of the polymer, the degree of structuring,the ratio of components of the polymer: water.

Досліджено міжмолекулярні взаємодії у водних розчинах поліакриламіду (ПАА) та
лауретсульфату натрію (ЛСН), як аніонної поверхнево-активної речовини (ПАР). На
основі вимірювання поверхневого натягу на межі “повітря-розчин”, електропровідності
та густини сумішей ПАА та ПАР підтверджено утворення асоціатів ПАР з
макромолекулами ПАА. За ізотермою поверхневого натягу визначено величину
критичної концентрації міцелоутворення ПАР, яка знаходиться в межах цієї величини
для аналогічних систем, які є відомими з літератури. Запропоновано узагальнюючу

This article describes the reservoir’s average shear rate calculation and the rheological study of the polymer dispersion under the target reservoir conditions. It also identifies and quantifies the rock-fluid interaction parameters with this reservoir, including the total adsorption, residual resistance factor. The results confirm that the selected polymer is suitable to the target reservoir.

Dextran-graft-Polyacrylamide copolymers (D-g-PAA) with a polysaccharide backbone having different molecular weights (Mw = 20 000 and Mw = 70 000) and with various number of PAA-grafts per one Dextran macromolecule have been synthesized. Light scattering and viscometry investigations have shown that the internal structure of D-g-PAA copolymers depends upon the distance between PAA-grafts.