CHEMICAL TECHNOLOGY (inorganic and organic substances. Theoretical fundamentals)

PERSPECTIVE DIRECTION OF CALCULATION AND DESIGN OF REINFORCING CARCASSES OF TENSION FIRE HOSES ON BASIS OF SYNTHETIC FIBERS

The physical and chemical properties of synthetic fibers of various compositions for reinforcing carcasses of pressure fire fibers, and their appointment and structure were de-noted. It is noted that due to the effect of negative factors (mechanical wear, impact of low and high temperatures, the action of sunlight, aging of the material, accidental release of chemically active substances, etc..) on pressure fire hoses at their exploitation, increased de-mands are imposed on the material of synthetic fibers of pressure fire hoses, the most im-portant of which is resistant to abrasion. The use of pressure fire hoses from polyester fibers based on PET shows that the main reason for breaking up the fibers at their exploitation is abrasion of the surface.

2016, Т. 59, № 7, Стр. 92-95

RESEARCH OF INFLUENCE OF CROSS-LINKING AGENTS ON CHARACTERISTICS OF SPATIAL GRID AND PROPERTIES OF URETHANE POLYMER

Results of study of influence of amount of functional groups of glycidyl ethers on charac-teristics of the spatial grid of crosslinked polyurethane polymer are presented. Parameters of a three-dimensional spatial grid of investigated samples of polymeric films and their physical and mechanical properties were determined by a method of equilibrium swelling in organic solvents.

Key words: polyurethane dispersion, crosslinking agent, polymeric film, crosslinking degree

REFERENCES
1. Grablowitz H.G. Pat. 2013/051142 EР., appl. number: PCT/EP2013/051142; filed 25.01.2012; publ. 01.08.2013.
2. She Y., Zhang H., Song S., Lang Q., Pu J. // BioResources. 2013. V. 8. N 2. Р. 2594-2604.
3. Athawale V.D., Kulkarni M.A. // J. Coat. Tech. & Res. 2010. V. 7. I. 2. Р. 189-199.
4. Technology for Waterborne Coatings. / Ed. J.E. Glass. Washington, DC: American Chemical Society. 1997. Р. 164–182.

2016, Т. 59, № 7, Стр. 86-91

FEATURES OF X-RAY ANALYSIS OF CRYSTALLINITY DEGREE OF POLYPROPYLENE FIBRES

The need to take into account the anisotropy of compact samples pressed from grinded polypropylene (PP) fibres at a determination of the degree of polymer crystallinity by X-ray method was shown. It was proved that the breach of the spherical scattering symmetry of X-rays by PP fiber samples is not connected with an amorphous phase of polymer. The method for calculating the degree of crystallinity of fibres from the normalized intensity of the diffuse halo of preparations under study and standard powder PP samples was proposed.

Key words: X-ray analysis, polypropylene fibres, anisotropy, crystallinity degree

REFERENCES
1. Eichhorn S., Hearle J.W.S., Jaffe M., Kikutani T. (eds.). Handbook of Textile Fibre Structure. V. 1: Fundamentals and Manufactured Polymer Fibres. Cambridge: Woodhead Publ. 2009.
2. Wunderlich B. Macromolecular physics. V. 1. N.Y.: Academ. Press. 1973.
3. Segal L., Creely J.J., Martin A.E. Conrad C.M. // Textile Res. J. 1959. V. 29. N 10. P. 786-794.

2016, Т. 59, № 7, Стр. 80-85

HIGH-PERFORMANCE MICROPOROUS MEMBRANES IN TECHNOLOGIES OF SEA WATER PURIFICATION

Now the microfiltration are widely used for treatment of surface waters (sea, river) from the fine suspended solids, colloidal and organic compounds including their preparation for reverse osmosis desalination and for purification of waste and water processing at the creation of closed systems of water use. The process of water purification using microfiltra-tion elements of roll type on the basis of micro porous membranes with cylindrical pores of 0.2 microns size at laboratory and industrial plants was studied. The technology for pre-treatment of water prior to microfiltration by coagulant dosing to increase the specific productivity of microfiltration elements and the quality of the filtrate was proposed. The op-timal dose of ferric chloride coagulant and the time of contact with water and water quality parameters (color, turbidity, total iron content, the index of density of sediment) were deter-mined.

2016, Т. 59, № 7, Стр. 75-79

STUDY OF EFFECT OF DIFFERENT ORIGIN PIGMENTS ON FRICTIONAL PROPERTIES OF POLYUREA GREASES

In connection with development of techniques and technologies and unification and substitution the most important task for Russia is to solve the problem of development and in-troduction of modern high-quality domestic greases. The most suitable in this respect is greases with the urea derivatives thickener — organic compounds containing in molecules one or more urea (urea, wreath) groups. In recent years, the production of these lubricants attracts increased attention of specialists, because they have unique exploitation characteris-tics: the combination of high-hydrolytic and chemical resistance, operability in a wide tem-perature range, thermo-strengthening lack, retention its properties at high speeds and specif-ic loads, in contact with adverse environments, etc. We received greases based on poly urea with the addition of pigment. The synthesized pigments have different structure and belong to different classes of compounds.

2016, Т. 59, № 7, Стр. 68-74

EXTRACTION AND REEXTRACTION OF HISTIDINE AND RIBOFLAVIN BY N-VINYLCAPROLACTAME COPOLYMERS WITH 1-VINYL- AND...

EXTRACTION AND REEXTRACTION OF HISTIDINE AND RIBOFLAVIN
BY N-VINYLCAPROLACTAME COPOLYMERS WITH 1-VINYL- AND 1-METHACRYLOYL-3,5-DIMETHYLPYROZOLE

2016, Т. 59, № 7, Стр. 55-60

SYNTHESES OF ω -Н-PERFLUORINE CARBOXYLIC ACIDS BY OXIDATION OF ALCOHOL-TELOMERS H(CF2CF2)nCH2OH

Methods of synthesis of ω-Н-perfluorine carboxylic acids by oxidation of alcohol-telomers of H(CF2CF2)nCH2OH (n = 1 – 4) composition were developed. Physical-chemical properties of poly fluorinated alcohols and carboxylic acids were determined.

Key words: poly fluorinated alcohols- telomers, ω-Н-perfluorine carboxylic acids

REFERENCES
1. Tyuganova M.A., Kop’ev M.A. Comp. ZNII cotton ind. 1989. N 2. P. 31-36 (in Russian).
2. Novakov I.A., Rakhimov H.A. Zhurn. Prikl. Khimii. 2009. V. 82. N 1. P. 132-136 (in Russian).
3. Alcohols-telomers of poly fluorinated and reactive grade. Ed. Petrov A.I. Perm: OAO “Galogenpolimer”. 2008. 38 p. (in Russian).
4. Buehler C.A., Pearson D.E. Survey of organic syntheses. V. 2. Wiley-Interscience. N.-Y. 1970. 1105 p.

2016, Т. 59, № 7, Стр. 51-54

INVESTIGATION OF THERMAL PROCESSES OCCURING AT HEATING OF CAPROLACTAM SOLUTIONS AND ITS CYCLIC OLIGOMERS...

INVESTIGATION OF THERMAL PROCESSES OCCURING at HEATING OF CAPROLACTAM SOLUTIONS AND its CYCLIC OLIGOMERS IN AMORPHOUS areas OF POLYAMIDE-6

Samples of caprolactam and polyamide-6 granules of different composition prepared by drying methods, sublimation and extraction were investigated by thermogravimetry and differential scanning calorimetry. The temperature range for the process of de-monomerization-drying of polyamide-6 granules was determined on the basis of the thermogravimetry and differential scanning calorimetry data of submitted samples.

Key words: polyamide-6, caprolactam, oligomers

REFERENCES
1. Klare G, Fritzsche E, Grebe F. Synthetic polyamide fibers. M.: Mir. 1966. 683 p. (in Russian).
2. Radionov V.A., Platonov E.K. Trudy VNIIMSV. 1966. N 1. P. 15-21 (in Russian).
3. Kolchinskaya L.M., Fishman K.E. Khim. Volokna. 1970. N 2. P. 69-72 (in Russian).
4. Kuzina E.F. Khim. Volokna. 1966. N 3. P. 30-32 (in Russian).

2016, Т. 59, № 7, Стр. 47-50

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