The technology for producing montmorillonite modified with polyionenes has been developed. It was shown that macromolecular polymer intercalation of the quaternary ammonium salt of montmorillonite intercrystalline space is accompanied by an increase in interlayer distances from 1.08 to 1.67 nm. A method for the synthesis of montmorillonite modified with polyionenes is proposed.
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.
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.
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.
The features of adipic acid esterification with 1-butanol in the presence of aluminosilicates activated with sulfuric acid as a catalyst have been studied. The optimal process conditions have been determined. The influence of a heterogeneous catalyst nature on the esterification proceeding has been defined. Досліджено закономірності естерифікації адипінової кислоти 1-бутанолом у при- сутності активованих сульфатною кислотою алюмосилікатів як каталізаторів. Визначено оптимальні умови процесу. Встановлено вплив природи гетерогенного каталізатора на перебіг естерифікації.
Досліджено адгезійні властивості композицій 2-гідроксиетилметакрилату та
полівінідпіролідоном за різних ініціювальних систем. Проаналізовано вплив різної
природи ініціатора полімеризації на адгезійну міцність клейового шару, утвореного з
композицій з мінеральних наповнювачів. Використано наповнювачі з різними фізико-
хімічними, структурними та іншими властивостями, а саме: гідроксиапатит, монтмо-
рилоніт та комплекс монтморилоніт – полівінілпіролідон (1:5). Встановлено вплив
Modified clays were intercalated with benzethonium chloride and benzalkonium chloride by exchanging the sodium ions. The organoclays obtained were characterized by X-ray diffraction (XRD); thermogravimetric analysis (TGA) and low field nuclear magnetic resonance (NMR), through proton spin-lattice relaxation time measurements (T1H). From the characterization data, the formation of organically modified clays was confirmed. These products can probably be used to prepare PVC nanocomposites with superior processing characteristics due to better chemical structure of clay surfactants.
In this thesis the features of rheological behavior of ultrasonic-activated water dispersions of montmorillonite in the presence of surfactants of anionic and non-ionic type are considered. It was determined that the strength of coagulation structure changes depending on the type of surfactant.
The polymerization of 2-hydroxyethylmethacrylate compositions with polyvinylpyrrolidone has been investigated in the presence of mineral fillers (hydroxyapatite, montmorillonite and wollastonite). The influence of the nature and amount of mineral filler on polymerization kinetics and composition of copolymers has been determined. In the composite structure silver particles were obtained via silver nitrate reduction by polyvinylpyrrolidone tertiary nitrogen. The synthesized silver-containing composites possess bactericidal properties against E. colі and S. aureus bacteria, in particular.