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Study of moisture absorption by an organoplastic

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Conclusion

A complex experimental study of the state of sorbed moisture in a unidirectionally reinforced organoplastic was conducted. The methods of TG, DSC, DTA, and NMR showed that moisture absorption in OP is reversible up to 8%, the sorbed moisture does not crystallize in the temperature range from −70 to 0 °C, it is finely dispersely distributed and is in the strongly and weakly bound state, and there is almost no free moisture. The results of the sorption experiments conducted on OP and its structural components: microplastic and EDT-10 binder, in a wide range of temperature-humidity conditions and the data from physical studies showed that moisture absorption in the materials basically takes place by diffusion and is satisfactorily described by a phenomenological model based on the Fick equation.

A method of accelerated determination of the sorption characteristics of anisotropic composite materials was developed, using the introduced concept of the fictitious diffusion coefficient and the extrapolation method of determining the limiting moisture content. The features of migration of moisture on the interface in a multiphase system were investigated, and the possibility of successive calculation estimation of the sorption characteristics of an organoplastic at different structural levels was demonstrated: components—unidirectionally reinforced composite—model laminated article. The tested phenomenological model of the sorption process and the experimentally obtained values of the characteristics of the material were the basis for a method of calculation determination of the resource of moisture-proofing properties of a model multilayer article of CM in nonstationary external conditions.

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Literature cited

  1. 1.

    S. D. Garanina, G. S. Shul', L. B. Lebedev, L. M. Shkirkova, L. A. Shchukina, M. A. Ermolaeva, and G. P. Mashinskaya, “Effect of water on the properties of organoplastics,” Mekh. Kompozitn. Mater., No. 4, 652–656 (1984).

  2. 2.

    G. I. Milyutin, V. N. Bulmanis, T. S. Grakova, N. S. Popov, and A. M. Zakrzhevskii, “Study and prediction of the strength characteristics of an epoxy wound organoplastic for different conditions of environmental exposure,” Mekh. Kompozitn. Mater., No. 2, 247–253 (1989).

  3. 3.

    A. Ya. Malkin and A. E. Chalykh, Diffusion and Viscosity of Polymers. Methods of Measurement [in Russian], Moscow (1979).

  4. 4.

    A. N. Tynnyi, Strength and Failure of Polymers in Exposure to Liquid Media [in Russian], Kiev (1975).

  5. 5.

    Environmental Effects on Composite Materials, Vol. 2, Lancaster (1984).

  6. 6.

    A. N. Aniskevich, “Experimental study of sorption of moisture in EDT-10 epoxy binder,” Mekh. Kompozitn. Mater., No. 6, 969–973 (1984).

  7. 7.

    A. N. Aniskevich, “Sorption of moisture by a unidirectional organoplastic in steady-state temperature-humidity conditions,” Mekh. Kompozitn. Mater., No. 3, 524–530 (1986).

  8. 8.

    A. N. Aniskevich and N. E. Khramenkov, “Study of the effect of moisture on the properties of an organoplastic by methods of thermal analysis,” Mekh. Kompozitn. Mater., No. 5, 911–916 (1989).

  9. 9.

    I. G. Matis, G. M. Kerch, and A. N. Aniskevich, “Study of the state of water sorbed by an organoplastic by high-resolution1H nuclear magnetic resonance and differential thermal analysis,” Mekh. Kompozitn. Mater., No. 2, 317–320 (1990).

  10. 10.

    K. Kondo and T. Taki, “Moisture diffusivity of unidirectional composites,” in: Environmental Effects on Composite Materials, Vol. 2, Lancaster (1984), pp. 288–299.

  11. 11.

    A. S. Loos and G. S. Springer, “Moisture absorption of graphite-epoxy composites immersed in liquids and humid air,” J. Composite Mater.,13, 131–147 (1970).

  12. 12.

    G. Menges and H. W. Gitschner, “Sorption behavior of glass-fiber reinforced composites and the influence of diffusion media on deformation and failure behavior,” ICCM 3, Vol. 1, 25–48 (1980).

  13. 13.

    M. Woo and M. R. Piggott, “Water absorption of resins and composites. 2. Diffusion in carbon and glass reinforced epoxides,” J. Composites Technol. Res.,9, No. 3, 101–107 (1987).

  14. 14.

    C. H. Shen and G. S. Springer, “Moisture absorption and desorption of composite materials,” J. Composite Mater.,10, 2–20 (1976).

  15. 15.

    C. C. Chamis, “Simplified composite micromechanics equations for hydro, thermal and mechanical properties,” SAMPE Quarterly, 14–23 (April 1984).

  16. 16.

    R. Kristensen, Introduction to the Mechanics of Composites [Russian translation], Moscow (1982).

  17. 17.

    S. S. Nikol'skii, “Diffusion and Heat Transfer in Composite and Porous Substances. 1. Phenomenological Relations,” Mekh. Kompozitn. Mater., No. 4, 715–722 (1985).

  18. 18.

    J. M. Whitney, “Moisture diffusion in fiber reinforced composites,” ICCM,2, 1584–1601 (1978).

  19. 19.

    S. S. Nikol'skii, “Diffusion and heat transfer in composite and porous substances. 2. Practical equations,” Mekh. Kompozitn. Mater., No. 5, 801–809 (1985).

  20. 20.

    I. Verpoest and G. S. Springer, “Moisture absorption characteristics at aramid epoxy composites,” J. Reinfor. Plast. Composites,7, 2–22 (1988).

  21. 21.

    R. K. Miller, “Multimaterial model moisture analysis for steady state boundary conditions,” in: Environmental Effects on Composite Materials, Vol. 2, Lancaster (1984), pp. 162–164.

  22. 22.

    R. D. Stepanov and O. F. Shlenskii, Calculation of the Strength of Structures Made of Plastics Working in Liquid Media [in Russian], Moscow (1981).

  23. 23.

    L. P. Murav'eva, N. O. Semenova, G. S. Igonin, L. P. Samoilova, and V. V. Konstantinov, “Method of predicting the moisture protection of articles in containers made of composite materials,” in: Aging of Polymeric Materials and Articles [in Russian], Yakutsk (1986), pp. 126–131.

  24. 24.

    A. V. Lykov, Heat and Mass Exchange (Handbook) [in Russian], Moscow (1978).

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Translated from Mekhanika Kompozitnykh Materialov, No. 4, pp. 624–632, July–August, 1990.

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Aniskevich, A.N., Yanson, Y.O. Study of moisture absorption by an organoplastic. Mech Compos Mater 26, 455–462 (1991). https://doi.org/10.1007/BF00612617

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Keywords

  • Phenomenological Model
  • Sorption Process
  • Moisture Absorption
  • Sorption Experiment
  • Extrapolation Method