полівінілпіролідон

The Role of Polyvinylpyrrolidone in the Formation of Nanocomposites Based on a Compatible Polycaproamide and Polypropylene

The interrelation of physico-mechanical and technological characteristics of newly created nanocomposites on the basis of polypropylene (PP)/polyamide (PA-6) mixture with PVP-modified montmorillonite has been investigated. The significant impact of modified polyamide on technological, physical and mechanical properties and heat resistance of polypropylene has been determined. It has been established that the melt flow index of the resulting composites increases by more than 2 times, compared with pure PP.

Investigation of structure of nanocomposites on the basis of mixture of polypropylene and modified polyamide with using scanning electronic microscopy.

Mixtures based on polypropylene (PP) and polyamide (PA) are of great importance as structural materials, the mixing of which reduces the negative characteristics of the original polymers. Non-polar PP significantly reduces water absorption of the material during mixing with polar high hydrophilic PA. As a result, the effect of moisture on the mechanical and thermal properties of the composites decreases. On the other hand, mixing PP with PA can extend the temperature range of material exploitation at negative temperatures.

Surface characteristics of materials based on sodium liquid glass modified by polyvinyl alcohol and polyvinylpyrrolidone

The physicochemical properties of surface of the metal-containing polymer-silicate composites, which have been obtained due to compatible precipitation of water-soluble polymers and silicates under the influence of metal chlorides, such as specific surface area, the number of active centers, moisture absorption, sorption ability were studied.

Itensification of the process of receiving osteoplastic porosis composites with use of ultrasonic

The regularities of obtaining of osteoplastic porous composites based on 2-hydroxyethyl methacrylate with polyvinylpyrrolidone copolymers in the presence of mineral fillers (hydroxyapatite, montmorillonite and wollastonite) under ultrasound are researched. The influence of ultrasound, nature and amount of inorganic filler on the polymerization rate, copolymers composition and composites porosity has been determined. It was found that homopolymerization of 2-hydroxyethyl methacrylate without filler under ultrasound action does not occur in experiment conditions.

THE REGULARITIES OF METAL-FILLED HYDROGEL FILMS CENTRIFUGAL MOLDING

Composite hydrogel metal-filled materials in many cases during the operation are used in the form of films, in medicine these are membrane different kind, of transdermal drugs, implants, elements of medical equipment intended for installation of a reliable contact with the human body, the instrument making-elements of different sensors (humidity, temperature, pressure, concentration of gaseous and liquid products), etc.

THE FORMATION OF COMPOSITE FILM HYDROGEL MEMBRANES WITH POLYAMIDE LAYER

Polymer hydrogels, which are close to biological cells in their physical state, have proven to be effective in medicine and pharmacy. However, in practice the wide usage of hydrogel products is limited by their low mechanical strength, even though generally the application of hydrogels has a great potential . Recently, the interest to the polymer hydrogel materials, that have high mechanical strength in a hydrated state along with the hydrophilic and diffusion-transport properties, has increased.

THE USE OF ULTRASOUND IN REACTIONS OF OBTAINING OF POLYVINYLPYRROLIDONE COPOLYMERS AND (NANO)COMPOSITES ON ITS BASE

Usually, in chemical industry the energy of ultrasound is being used to intensify technological processes. However, the complexity of the mechanism of ultrasound action makes it difficult to create a single common theory that could explain its influence on the chemical reactions. Therefore, in each particular case wide-ranging studies of the influence of ultrasound on the chemical reaction, as well as on the structure and properties of the synthesized substances and materials are required.

Формування та властивості композиційних поліамід–гідрогелевих мембран

Розроблено методику одержання композиційних полімерних мембран модифікуванням поверхні гідрогелів тонким шаром полімеру. Підібрані склади і синтезовані ультратонкі плівкові мембрани з сумішей ПА-6/ПВП методом “сухого формування” з розчину. Одержано  композиційні полімерні мембрани на основі рідкостуктурованих кополімерів ГЕМА/ПВП, які зміцнені наношаром ПА-6/ПВП і досліджені їх експлуатаційні характеристики. Встановлено, що варіювання складами гідрогелевого і модифікувального шарів і режимами формування композиційних мембран можна направлено регулювати їхню міцність і проникність.

Тонкоплівкові полімерні композити мембранного типу з підвищеними фізико-механічними властивостями

The membrane type thinly-film composites on the basis of cross-linked co-polymers of 2- hydroxyethyl methacrylate with polyvinyl pirrolidone and aliphatic polyamide -6 are synthesized. The influence of formation conditions on physical and mechanical and sorption properties of synthesized films is investigated. Синтезовано тонкоплівкові композити мембранного типу на основі рідкоструктурованих кополімерів 2-гідроксіетилметакрилату з полівінілпіролідоном і аліфатичного поліаміду-6. Досліджено вплив умов формування на фізико-механічні і сорбційні властивості синтезованих плівок

Фоточутливість композицій 2-гідроксіетилметакрилат- полівінілпіролідон-сіль заліза (ііі) та її вплив на структуру і властивості продуктів полімеризації

The photosensitivity of 2-hydroxyethyl methacrylate- polyvinyl pirrolidone- iron salt (ІІІ) compositions with different content of polyvinyl pirrolidone and its influence on the structure and properties of polymerization products is investigated. The results of research make it possible to correct photosensitivity of mentioned compositions and properties of the polymers on their basis depending on changes in the polyvinyl pirrolidone content.