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To form a network polymer structure of melamine-formaldehyde alkyd paints and varnishes (APV) oligomeric film formers modified with vegetable oils or their fatty acids, alkyd resins and varnishes, as well as materials based on amino formaldehyde resins plasticized with polyethers (alkyd resins) are used. The main disadvantage of APV is the long drying time in the air (it takes more than a day to dry one layer), unsatisfactory decorative and protective performance of coatings, their unstable resistance to atmospheric and environmental influences. Melamine alkyd APV can withstand longer and aggressive weathering, but the process of hardening occurs at high temperatures with significant energy consumption, the process is time consuming and unsuitable for modern technologies for assembling devices, machines, engineering structures in combination with different materials. The aim of our research was to improve existing APV based on amino formaldehyde resins and creating new film formers using oligomeric cyclic carbonates and oligomeric amines in order to improve the properties of materials. The modification of melamine-alkyd paints and varnishes with compounds contained high content of polar groups and capable to form chemical and physical bonds with active groups of functionalized plant oligomers is a promising way to improve the properties. A three-step method of synthesis urethane-containing modifier based on carbonized vegetable oil, aminoethyl piperazine, maleic anhydride and melamine alkyd resin was developed to obtain new polymer coatings. The synthesized modifier - amido urethane maleate based on vegetable oil is characterized by the presence of numerous active groups that interact with melamine alkyd resin K-421 and PF-060 to form a branched polymer structure that is stable during storage. Modified APV samples with 10% and 15% of oligoamidurethane maleate have been developed, which are characterized by enhanced physico-mechanical, adhesive and processing properties and can be recommended for practical application in various coating technologies. The structural features of the initial reagents and the obtained products were studied by FTIR spectroscopy. [ABSTRACT FROM AUTHOR]

Modification of the cellulose triacetate compositions by the transesterification products of tris [tri (butoxy) titanoxy] borane of monocarboxylic stearic acid was carried out. It was shown that the used series of boron, titanium, stearatacyloxy-containing products oftransesterification of tris [tri (butoxy) titanoxy] - borane by stearic acid is an effective modifier of soluble TAC. This modification allows you to adjust the viscosity of the solution in a wide range and improves the physic o-mechani с al characteristics of the films obtainedfrom these solutions (the tensile strength of the films increases by 2,0-2,5 times). The most effective use of such compounds is provided when they are introduced in the amount of up to 0.1 wt% from the mass of the TAC. In this case, there is a process of crushing large supramolecular formations into smaller ones. Internal stresses in the polymer practically disappear, the relative hardness of the films and their tensile strength grow. The obtained results may be especially valuable in the recycling of waste of TAC. [ABSTRACT FROM AUTHOR]

Получено привитые сополимеры, синтезированные на основе функционализированного сополимера этилена с винилацетатом и реакционноспособного олигомера льняного масла, которые были использованы в качестве матрицы при создании органо-полимерных нанокомпозитов, содержащих в качестве нанонаполнителя модифицированный монтмориллонит и углеродные нанотрубки. Для придания органофильных свойств и для лучшей совместимости органических и неорганических компонентов проведена модификация поверхности монтмориллонита. В качестве модификатора был использован диэтаноламин. Методом ИК-спектроскопии и рентгеноструктурного анализа было исследовано структуру модифицированного монтмориллонита. Результаты проведенных реологических и физикомеханических испытаний полученных нанокомпозитов показали, что наполненные полимерные нанокомпозиты демонстрируют лучшие свойства по сравнению с исходным сополимером. Установлено, что модифицированный монтмориллонит является активным наполнителем при создании наноструктурированных полимерных систем. [ABSTRACT FROM AUTHOR]

Synthesized hidden macrodiisocyanate (MDI) based on hydroxyl-containing oligodienes and blocking agent - p-hinondioksym. The evaluation of the thermal stability of hidden MDI by method thermogravimetrical analysis. The influence modifier - hidden MDI on the physico-mechanical characteristics and structural features of composite materials, obtained on the basis of dispersed rubber crumb and hydroxyl-containing copolymer of ethylene with vinyl acetate have been investigated. The effective concentration of a hidden MDI and its influence on mechanical and deformation characteristics polymer composites have been determined. Shows that the use of hidden MDI as a modifier to the mentioned above composite, leads to the improvement of their strength characteristics. [ABSTRACT FROM AUTHOR]

The biological stability of the modified and unmodified samples ofpolyurethane coatings to corrosive action of bacteria was studied. It is shown that materials based on polyurethane with an ester gidroksilconfaining: are biological stability to the action of bacteria-coatings destructors Materials based on polyurethane with polyether gidroksilcontaining component- are not biostability. However, the sulfate-reducing bacteria, as the most dangerous corrosive agents exhibit little metabolic activity in the presence of a coating on the basisperhlorvinilpolyretane modified by organic-inorcanic oligomer NONO. Such materials may also be promising for biostable coatings. Investigation of biocidal properties of antiseptics as inhibitors (1 and 2 %) in relation to the corrosion aktive bakteria showed their selectivity. It was found that among the best studied antiseptics titanium, amine compound sexhibit biocidal properties. [ABSTRACT FROM AUTHOR]

A method of modification of hyperbranched poly(ester polyol)s with different а d-oligo(ether urethane diisocyanate)s and subsequent introduction of sulfuric and sulfonic terminal groups was proposed. Hyperbranched poly(ether urethane isocyanate)s were synthesized by the reaction of the third generation hyperbranched aliphatic poly(ester polyol)s with a,0- oligo(ether urethane diisocyanate)s based on oligo(oxyethylene glycol), oligo(oxypropylene glycol) and oligo(oxytetramethylene glycol) with molar masses of 1000 g/mol and 2,4-, 2,6-tolylene diisocyanate. The compounds containing olygo(ether urethane urea) fragments with terminated sulfuric and sulfonic groups in the form of potassium salts in the outer shell were obtained by interaction of hyperbranched poly(ester urethane isocyanate)s with potassium salts of 2-aminoethyl hydrogen sulfuric and 2-aminoethanesulfonic acids. The synthesized hyperbranched compounds were characterized by functional analysis and IR spectroscopy. According to differential scanning calorimetry they are amorphous compounds with a glass transition temperature in the range of -16 +-57 °C in relation to the oligoether nature and salt group type. These compounds are micelle-forming surfactants and their limiting surface activity is 14 orders of magnitude more then surface activity of surfactants with classical structures. Their colloid- chemical properties also depend on the type of salt group and the nature of oligoether. [ABSTRACT FROM AUTHOR]

The samples of titanium dioxide (TiO2) modified by the fi-cyclodextrin-containing polymers were synthesized. The obtained organic-inorganic polymeric materials and mechanical blends of initial polymers were investigated by pyrolysis mass spectrometry. The analysis of results indicates the formation of chemical bonds between the TiO2 surface and the polymer organic layer. It should be noted that the modified TiO2 samples are more heat-resistant compared to the corresponding mechanical blends. It has been established that the nature of coat layer affects the heat resistance of the polymers obtained. [ABSTRACT FROM AUTHOR]

The structure and physicochemical properties of polyaniline composites and nanostructured ZnO have been investigated using methods of thermogravimetric analysis, infrared spectroscopy and scanning electron microscopy. It was shown that the modification of zinc oxide surfaces with phenyldiazonium tetraftorborate changes conductivity of composites. Add to composites of carbon nanotubes allows widely change the electrical conductivity of composites [ABSTRACT FROM AUTHOR]