Synthesis reactions and physico-mechanical, thermal properties of new aromatic copolyethersulfone ketones were studied in relation to the chemical structure of activated dihaloarenes and diols in a simpler, more economical way. It is shown that by controlling the ratio of monomers and the order of their introduction into the copolycondensation reaction, it is possible to obtain aromatic copolyethersulfone ketones with increased temperature and physicomechanical characteristics.

Processes of dressing the surface of glass fiber and their effect on the properties of composite materials based on polyetherimide filled with glass fibers were evaluated. It was found that preliminary thermal treatment of glass fibers and their subsequent treatment with a dressing agent, copolyhydroxyether based on di(4-hydroxyphenyl)sulfone, 4,4′-dioxydiphenylpropane, and 3-chloro-1,2-epoxypropane, allow obtaining polyether—etherimide composite glass-filled materials exhibiting improved physical and mechanical properties.

The paper presents the results of investigations on fi nding out the possibility of synthesis of powdered aromatic polyetheretherketones and copolyetheretherketones, combining solubility in some organic solvents and crystallinity. It has been shown that, in certain intervals of monomer content, it is possible to obtain copolyetheretherketones that have some crystallinity and remain soluble in some organic solvents. A simplifi ed method for obtaining aromatic polyetherketones and copolyaryleneetherketones has been developed. The high values of thermal and mechanical characteristics enable to recommend the obtained polyetheretherketones and copolyetheretherketones for forming special-purpose products using 3D-technologies.

The influence of treated carbon nanofibers on the molecular weight and properties of polymer materials was studied. Polyhydroxy ether of bisphenol A was used as a polymer matrix. The in situ synthesis of nanocomposite enabled one to obtain polymer composites with high molecular weight and density, as well as to improve their hardness.

Data are given on aromatic copolyether ether ketones obtained from aromatic diols, namely, hydroquinone and diphenylolpropane (Bisphenol A). The copolyethers were synthesized by high–temperature copolycondensation of the corresponding diols with 4,4'–difluorobenzophenol. The dependence of the rheological and thermochemical properties of the polymer samples on the mole ratio of the diphenols was studied for a broad range of monomer concentrations. Enhanced heat resistance along with decreased intrinsic viscosity and glassy point temperature were found for copolyether ether ketones with a greater content of hydroquinone.

The article deals with the study of influence of the synthesis conditions on the molecular weight of polyaryleneetherketones (PAEK), received with nucleophilic substitution reaction of activated aryl halide. The synthesis of PAEK with the nucleophilic substitution reaction carried out as partially hydrolyzed homopolycondensation of phenolates and aromatic dihalides containing a carbonyl group in the molecule and derivatives of polycondensation of aromatic bisphenols with activated aromatic dihalides, and aromatic nitro compounds. The nucleophilic substitution of halogen in aryldihalogens proceeds through formation of Meisenheimer complex, where the negative charge of the electron-electron ring stabilizes the group. The high efficiency of the synthesis of PAEK with nucleophilic substitution reaction is mainly determined with several factors, the main of which are: 1) the structure of the starting monomers; 2) the nature of the solvent; 3) the nature of phenolate; 4) side reactions. For these materials it was revealed that the ratio of nucleophilic and electrophilic reagents has pronounced effect on the molecular weight of the obtained polymer, without affecting the poly dispersion. PAEK synthesis processes are optimized by controlling the replacement of some of the monomers, the temperature and concentration of reactants change. It was shown that the polyarylene ether ketones and copolymers have a high thermal heat resistance, mechanical properties. They show considerable heat resistance in air, capable of forming a transparent film and melts. Thus, data of literature review show that the nucleophilic substitution reaction is promising for PAEK synthesis of various chemical structures and produces polymers having valuable properties.

The possibility of producing thermoplastic glues based on polyhydroxyether has been investigated. It has been shown that an in situ introduction of carbon nanofiber in the treated form in an optimal amount equal to 0.05 wt % during polymer synthesis results in the improvement of the strength, adhesion, and thermal characteristics of the produced composite.

Aromatic polyether ether ketones are polymers whose volume of production is now increasing at a rapid rate, which is due to the important array of service properties of these polymers. Certain processing characteristics of composites based on polyether ether ketones are considered in this paper.

Composites based on polyhydroxy ether and graphite of industrial grades MPG and GL were produced and investigated. Methods were developed for introducing graphite into the polymer matrix. It was shown that preliminary oxidative surface treatment of the graphite leads to the selective adsorption of monomers on its surface, which lowers the rate of the reaction in situ during the production of the composites. It was shown that the method for introducing the graphite and the amount of the latter have a considerable influence on the properties of the composite obtained.

Из-за высоких значений теплофизических и физико-механических свойств полиариленэфиркетоны находят широкое применение в различных областях техники. В данной статье приведены физико-механические показатели и использование некоторых полиэфирэфиркетонов. Приведен сравнительный анализ полиэфирэфиркетонов, производимых в России и за рубежом. Показано, что полиэфирэфиркетоны фирмы «VictexR» проявляют высокую химическую стойкость к водным реагентам и к действию веществ с широким пределом рН, начиная от 60 % серной кислоты и 40 % щелочи. Полиэфирэфиркетоны растворяются только в протонирующих растворителях (например, концентрированная серная кислота) или при температуре, близкой к его температуре плавления. Из органических растворителей на ПЭЭК действует ?-хлорнафталин, температура кипения которого 260 °С, и бензофенон. Являясь представителем термопластичных материалов, ПЭЭК относится к числу изоляционных материалов. Эти полимеры являются огнестойкими, образуют мало дыма и токсичных веществ при горении.

Термостойкие полиэфиры, широко применяемые для получения конструкционных изделий, чаще всего перерабатываются методом высокотемпературной экструзии. При этом температура расплава близка к температуре деструкции таких полимеров, как полиэтилентерефталат, полисульфон и др. Снижение температуры переработки таких полимеров является задачей данного исследования. Для решения задачи были получены композиционные материалы полисульфона и полиэтилентерефталата, содержащие термостабильный простой полиэфир – полигидроксиэфир бисфенола А, который синтезирован методом осадительной поликонденсации из эпихлоргидрина и бисфенола А. Образцы полигидроксиэфира с молекулярной массой 25–45 тысяч у.е. вводились в полимерную матрицу методом экструзии, либо совместным растворением в легколетучем органическом растворителе с последующей сушкой образца. Проводилось испытание термостойкости, исследование показателя текучести расплава полученных композитов. Показано, что введение в полимерную матрицу полисульфона и полиэтилентерефталата 3–9 масс. % полигидроксиэфира приводит к снижению показателя текучести расплава на 25–30 °С за счет эффекта пластификации.

The article is devoted to possibility of using recycled polyethylene terephthalate by obtaining on its basis of composite materials. Used as filler layered silicate Nalchik, which is produced in the North Caucasus. Investigated the optimum compositions and some properties of the composites.

The data on the synthesis of polyesterketones, including carded, comb-shaped and block polyetherketones were considered and generalized. It was revealed that the polyesterketones are a promising class of polymers, which are widely used in almost all fields of technic, which is associated with a unique combination of a broad set of valuable performance properties. The requirements for polymeric materials grow continuously. An important quality indicator of the growth is the appearance of the new and improved materials. The materials of the future, in particular, the high-performance polyetherketones open up new opportunities for innovative technical products.

Block copolysulfonarylates are synthesized by polycondensation in solution, and their physicochemical properties are studied. It is shown that, upon thermal curing, the resulting polymers can be used as sealants for effective protection of elements of electronic equipment from temperature impact up to 200°C, climatic factors, solvents, and chemical reagents.

Polyethylene terephthalate is one of the most widely used materials in the production of containers and packaging. However, its application is limited by its low barrier properties in relation to oxygen and carbon dioxide. Methods used for the manufacture of containers with improved gas barrier properties are discussed.

The method of synthesis of polyhydroxoesters of bis-phenol A by sedimental polycondensation was developed and some properties of polyhydroxyesters of various structures were investigated. The opportunity of reception of linear polyesters of high molecular weight with a narrow molecular-mass distribution unlike methods which are used now was shown.

The results of chemical modification of syndiotactic 1,2-polybutadiene under the action of reagents of various chemical nature are discussed. On the base of literature data and results of own studies the estimation of reagent nature influence on reactivity of double >C=C< bonds was carried out for 1,2-polybutadiene macromolecules at its chemical modification and the structure of modified polymer products.