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Fine Chemical Technologies

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Vol 1, No 5 (2006)
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SYNTHESIS AND PROCESSING OF POLYMERS AND POLYMERIC COMPOSITES

3-19 100
Abstract
Methods of networks formation in different polymers or olygomers are considered. The possibility of rheokinetic description for chemical network formation in elastomers and their binary blends evaluation was shown. These elastomers differ from each other by polarity, reactivity and crosslinking mechanisms. Rheokinetic method represents the new approach for vulcanization regimes, structure and properties of such materials optimization
20-40 66
Abstract
The processes of surface modification in aqueous dispersions of hydrophilic inorganic pigments (titanium dioxide, ferrous oxide) as well as hydrophobic organic pigments (copper phthalocyanine and carbon black) by polymers of various nature were reviewed. The pigment surface modification by these polymers was achieved by conventional adsorption as well as by mechanical (ultrasonic and vibrowave) treatment of the pigment dispersion. The efficiency of the pigment surface coating was followed by the IR-analysis, Electrokinetic Sonic Amplitude (ESA) method and transmission electronic microscopy that enabled to gain quantitative data about the thickness and structure of polymer adsorption layers. Ultrasonic and vibrowave techniques have been shown to provide significant improvement of polymer adsorption layer thickness and to be a promising way for the surface modification of pigments with regard to their dispersion stability. Thermo-responsive («smart») polymers were shown to be effective temperature-controlled modifiers for both hydrophobic and hydrophilic pigments
41-44 40
Abstract
It was investigated the influence of the correlation of sulfoacid and aniline concentration on the polymerization of the latter when it was protonated by polymeric sulfoacid and on electronic structure of forming polyaniline.
45-49 43
Abstract
Strength and deformation properties of cured compositions based on unsaturated polyester resin and portlandcement were investigated in all range of concentrations. Optimal ratio of components which lead to high strength properties and high deformation ability was found
50-54 54
Abstract
The multimolecular complexes were prepared from chitosan and biodegradable polymers. Their mechanical and structural properties were studied; the thermodynamic characteristics were calculated. It was shown that the films based on complexes possess higher strength, sorbtial ability and flame resistance as compared to the films from individual polymers
55-58 48
Abstract
Our scientific research, concerned with the opportunities of the application of some new silicon-based polymers at carrying out stomatologic procedures, is briefly submitted in this article. The results of the comparative tests with the silicon-based polymeric materials and the materials on the basis of the natural rubber are represented, as well as the graphic dependences confirming legitimacy of made conclusions. At the end of the article, there is the list of the scientific literature used as theoretical basis
59-63 54
Abstract
Shown that conductivity of ethylene-polypropylene copolymer filled SnCl<sub>2</sub> has ionic character. The feasible mechanism of polymer electrolytes conductivity for system ethylene-polypropylene copolymer – inorganic salt is considered according to experimental data
69-74 49
Abstract
The apparatus construction and primary techniques used on measurements of surface and interfacial tensions in high-viscous polymer melts has been examined. This method is based on spinning drop theory by Vonnegut. Measured values of surface and interfacial tensions for several polymer systems show good correlation with corresponding data from literature. Relative error of the measurements was in the range of 2-8%
75-78 40
Abstract
Addition of active sulphur-containing component into promoter system along with the use of silica as a substrate allowed us to reduce the amount of metal in rubber. The adhesion improvement using «silica – metal salt – polysulfide» system is a result of reciprocal activation of the system components. However, we found that polysulfide adsorption on the silica surface is accompanied by chemical interaction between the polysulfide molecules and surface reactive groups of silica. Hence, the silica is not the inert substrate for the «polysulfide-metal salt» system

CHEMISTRY AND TECHNOLOGY OF MEDICINAL COMPOUNDS AND BIOLOGICALLY ACTIVE SUBSTANCES

79-82 53
Abstract
A solution-phase synthesis for the preparation of substituted 2-(1,2,4-triazol-3- yl)benzimidazoles from triazole aldehydes and ortho-phenylenediamines has been developed for the purpose of producing diverse lead generation libraries.
83-86 37
Abstract
An efficient synthesis of 3-substituted cyclic amino acids via 1,4-conjugate addition of diorganocuprates to α,β-unsaturated cyclic α-aminoacids is described.The higher reactivity of copper reagents obtained from copper (I) chloride in comparison with CuCN, CuBr, CuI and CuBr*SMe2 has been shown

CHEMISTRY AND TECHNOLOGY OF INORGANIC MATERIALS

87-99 54
Abstract
Study of urinary stones of surgical removal has been fulfiled by complex methods. Information of phase and element composition have been received, microstructural examination has been made, causes of anomalous hardness of some stones have been found.


ISSN 2410-6593 (Print)
ISSN 2686-7575 (Online)