Науковий вісник НГУ

Model of changing the stressed-deformed state of a polymer sheet during stretching

• 
• 

User Rating:  / 2

PoorBest 

Details

Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 20 March 2019

Published on 03 March 2019

Hits: 3216

Authors:

M.Ye.Skyba, Dr. Sc. (Tech.), Prof., orcid.org/0000-0003-0217-9633, Khmelnytskyi National University, Khmelnytskyi, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.M.Synyuk, Dr. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0002-9615-0729, Khmelnytskyi National University, Khmelnytskyi, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

B.M.Zlotenko, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-0870-8535, Kyiv National University of Technologies and Design, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose.Development of methods for determining the degree of drawing, at which the transformation of the unoriented structure of the polymer sheet (geomembrane) into a highly oriented one begins, which increases its strength, and, thereafter, the durability in the process of gold extraction by heap leaching.

Methodology.The theoretical method for the investigation of the stress-strain state of a polymer sheet in the process of drawing on the basis of previously obtained experimental data.

Findings.The following has been developed: the model of the supramolecular spherulitic structure of amorphous-crystalline polymers in a non-oriented and oriented states; the method for determining the degree of drawing at which the destruction of the spherulitic structure of the polymer material begins.

Originality. For the first time, the problem of changing the stress-strain state of a polymeric material during its orientational drawing was solved by an analytical method. The developed mathematical model allows predicting the elastic properties of oriented amorphous-crystalline polymers of a spherulitic structure, which makes it possible to increase their strength in the desired direction.

Practical value.On the basis of theoretical studies, as well as the results of previously conducted experimental studies, a method was developed for determining the degree of drawing at which the destruction of the spherulitic structure of a polymeric material begins and a fibrillar structure is formed. This technique can be used while designing the equipment for the orientation of sheet polymer materials that are therefore used for strengthening polymer sheets (geomembranes), used for gold extraction by heap leaching.

References.

1. Teleshev, V. I. and Lupachev, O. Yu., 2009. Anti-filtration elements from geomembranes. Experience in hydrotechnical construction. Inzhenerno-stroitelnyiy zhurnal [pdf], 6, pp. 35‒43. Available at: <http://engstroy.spbstu.ru/index_2009_06/lupachev_geomembrany.pdf> [Accessed 14 October 2017].

2. Kulik, T., Synyuk, O. and Zlotenko, B., 2017. Modeling a process of filling the mold during injection molding of polymeric parts. Eastern-European Journal of Enterprise Technologies, 5/1(89), pp. 70‒77.

3. Akay, M., 2012. Introduction to Polymer Science and Technology. New York: Publishing ApS [pdf]. Available at: <http://www.iqytechnicalcollege.com/ME%20209%20Introduction-to-polymer-science-and-technology.pdf> [Accessed 3 December 2017].

4. Argon, А. S., 2013. The Physics of Deformation and Fracture of Polymers. New York: Cambridge University Press.

5. Isayev, A. I., ed., 2016. Encyclopedia of Polymer Blends. Vol. 3: Structure. New York: John Wiley & Sons.

6. Koseki, Yu., Keitaro, A. and Shinji, A., 2012. Crystalline structure and molecular mobility of PVDF chains in PVDF/PMMA blend films analyzed by solid-state F MAS NMR spectroscopy. Polymer Journal [pdf], 44, pp. 757–763. Available at: <https://pdfs.semanticscholar.org/02ed/9ea59ee2d193802562b86341e5a55d4d579c.pdf> [Accessed 22 November 2017].

7. Stoclet, G., Seguela, R., Vanmansart, C., Rochas, C. and Lefebvre, J.-M., 2012. WAXS study of the structural reorganization of semi-crystalline polylactide under tensile drawing. Polymer Journal [online], 53(2), pp. 519‒528. Available at: <https://www.sciencedirect.com/science/article/pii/S0032386111010019> [Acce­s­sed 22 November 2017].

8. Kireev, V. V., 2013. High-molecular compounds. Moscow: Yurayt.

9. James, E., Kenneth, S., Watkins, B., Watkins, J., Hesse, M. and Miller, N., 2012. Compositional gradients surrounding spherulites in obsidian and their relationship to spherulite growth and lava cooling. Springer [pdf], 4, pp. 229‒243. Available at: <https://pages.uoregon.edu/watkins4/pubs/2012_Gardner_etal.pdf> [Accessed 7 January 2018].

10. Ohlopkova, T. A., Borisov, R. V., Ohlopkova, A. A., Dyakonov, A. A., Vasilev, A. P. and Mironova, S. N., 2015. Microscopic studies of deformation of stretching of spherulitic structures in polymeric composite materials. Vestnik of the North-Eastern Federal University named after M. K. Ammosov, 3(47), pp. 75‒87.

11. Synyuk, O. M., 2016. Model structure undeformed polymer spherulitic structure. Bulletin of Khmelnytsky National University. Series “Technical sciences”, 3(237), pp. 181‒188.

12. Synyuk, O. M., 2016. Determination of the elastic properties of amorphous-crystalline polymer of spherulites structure. Bulletin of Vinnytsia National Technical University. Series “Technical sciences”, 6, pp. 77‒86.

13. Abdikarimov, M. N. and Turgumbaeva, R. H., 2015. Physical-mechanical properties of polymer composite materials, including waste products. Modern high technologies, 5, pp. 7‒11.

14. Wen, T., Zhou, Y., Liu, G., Wang, F., Zhang, X., Wang, D., Chen, H., Walton, K., Marchand, G. and Loos, J., 2012. Epitaxial crystallization of olefin block copolymers (OBCs) on uniaxially oriented isotactic polypropylene and high-density polyethylene films. Polymer Journal [online], 53(2), pp. 529‒535. Available at: <https://www.sciencedirect.com/science/article/pii/S0032386111010007> [Accessed 19 January 2018].

15. Utracki, L. А. and Wilkie, C. A., 2014. Polymer Blends Handbook. Netherlands: Springer.

16. Brazel, Christopher S. and Rosen, Stephen L., 2012. Fundamental principles of polymeric materials. New Jersey: John Wiley & Sons [pdf]. Available at: <https://the-eye.eu/public/Books/Materials%20science%20and%20engineering/M213%20Polymers/Christopher%20S.%20Brazel%2C%20Stephen%20L.%20Rosen-Fundamental%20Principles%20of%20Polymeric%20Materials-Wiley%20%282012%29.pdf> [Accessed 3 November 2017].

17. Fakirov, S., 2017. Fundamentals of Polymer Science for Engineers. Weinheim: Wiley-VCH Verlag GmbH & Co. KGaA.

 повний текст / full article

• < Prev