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  1. No Access

    Article

    A Quantum-Chemical Study of Tautomeric Equilibria of Fluorescein Dyes in DMSO

    We evaluated the relative thermodynamic stability of various molecular and anionic tautomers of fluorescein, its 2,4,5,7-tetrabromo derivative (eosin), and also sulfofluorescein, 4'- and 5'-amino-fluoresceins,...

    A. V. Lebed, A. V. Biryukov… in Chemistry of Heterocyclic Compounds (2014)

  2. No Access

    Article

    Implementation of the Results of Mathematical Modeling of Orientation of Polypropylene Fibre

    Process schemes for implementation of the optimum conditions of the final stage of orientational drawing of PP fibre are proposed based on the results of mathematical modeling. The existence of successive stag...

    A. V. Biryukov, S. E. Artemenko, V. P. Biryukov, V. V. Sotnikov in Fibre Chemistry (2004)

  3. No Access

    Article

    Analysis and Optimization of the Concluding Stage of Orientation of Polypropylene Fibre

    An algorithm and system for mathematical modeling and optimization of the concluding stage of orientation of PP fibre are proposed. The adequacy of the mathematical model was confirmed in different drawing reg...

    A. V. Biryukov, S. E. Artemenko, B. P. Biryukov in Fibre Chemistry (2003)

  4. No Access

    Article

    Mathematical Model of the Final Stage of Orientation of Polypropylene Fibre

    A mathematical model of the final stage of orientation of polypropylene fibre is constructed. The stress of the polymer in the hyperelastic state is used as an indirect estimation of the orientation index. A r...

    A. V. Biryukov, S. E. Artemenko, V. P. Biryukov in Fibre Chemistry (2003)

  5. No Access

    Article

    Analysis of the Change in Relaxation Properties of Polypropylene Fibre in Deformation

    A method is proposed for analyzing the change in the relaxation parameters of polymers during deformation by the method of repeated drawing with holding at each step until relaxation occurs. It is shown that t...

    A. V. Biryukov, S. E. Artemenko, V. P. Biryukov in Fibre Chemistry (2003)

  6. No Access

    Article

    Formalization of the Problem of Optimum Control of the Mechanical Properties of Polypropylene Fibre

    The problem was examined and a system was proposed for optimization of industrial fabrication of chemical fibres using relaxation parameters as indirect evaluation of the structure of the polymer. The necessit...

    A. V. Biryukov, S. E. Artemenko, V. P. Biryukov in Fibre Chemistry (2003)