PROCESSES OCCURRING IN THE POLYIMIDE FILMS PM-A (AS KAPTON H) DURING THE DEFORMATION AND COOLING

  • I. S. Braude B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., 61103, Kharkiv, Ukraine https://orcid.org/0000-0002-9307-007X
  • V. G. Geidarov B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., 61103, Kharkiv, Ukraine https://orcid.org/0000-0003-3745-982X
  • Yu. M. Pogribnaya B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., 61103, Kharkiv, Ukraine https://orcid.org/0000-0002-1529-7260
Keywords: polyimide, deformation, X-ray diffractometry, ordering

Abstract

The evolution of the film structure of polyimide PM-A (Kapton H type) after deformation at T = 300K, the effect of low temperatures and subsequent deformation at liquid nitrogen and liquid helium temperatures is studied. Particular attention is paid to comparative analysis of structural changes in the process of various external influences. The starting material was a film synthesized from solutions of prepolymers with a thickness of 0.08 mm. Part of the samples were subjected to a successively of temperature deformation and uniaxial deformation. For the original samples, we observed a symmetrical halo on the x-ray diffraction pattern on the small angles. The cooling of the polyimide film at T = 77 K 4.2K leads to the appearance of an additional peak in the region of smaller angles. The deformation of the sample at room temperature leads to the appearance of an additional peak in the region of large angles. Low-temperature deformation at temperatures of liquid nitrogen and liquid helium affects the structural state of the samples in different ways. Proposed two "mechanism", which are qualitatively, describe the processes in this polyimide films after deformation at low temperatures. It is assumed that as a result of cooling, "bundles" are formed, consisting of a different number of polymer segments. Low-temperature deformation at 77K and 4.2K, respectively, leads to compression and rupture of these bundles.

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Author Biography

V. G. Geidarov, B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., 61103, Kharkiv, Ukraine

References

1. Bessonov M.I., Koton M.M., Kudryavtsev V.V., Lajus L.A. Poliimidy – klass termostojkih polimerov [Polyimides - a class of heat-resistant polymers]. - Leningrad: Nauka, 1988. (in Russian)

2. Manzhelii V.G., Freiman Yu.A. Physics of Cryocrystals. – Woodbury, New York: AIP Press, 1996.

3. Kroto H.W., Heath J.R., O'brien S.C., Curl R.F., Smalley R.E. C60: Buckminsterfullerene // Nature. – 1985. – Vol.318. – P.162; doi:10.1038/318162a0

4. Iijima S. Helical microtubules of graphitic carbon // Nature. – 1991. – Vol. 354. – P. 56; doi:10.1038/354056a0

5. Jin L., Bower C., Zhou O. Alignment of carbon nanotubes in a polymer matrix by mechanical stretching // Appl. Phys. Lett.- 1998. – Vol. 73. – P. 1197, http://dx.doi.org/10.1063/1.122125

6. O'Connell M.J., Bachilo S.M, Huffman C.B., Moore V.C., Strano M.S., Haroz E.H., Rialon K.L., Boul P.J., Noon W.H., Kittrell C., Ma J., Hauge R.H., Weisman R.B., Smalley R.E. Band gap fluorescence from individual single-walled carbon nanotubes // Science. – 2002. – Vol. 297. – P. 593, doi:10.1126/science.1072631

7. Karachevtsev V.A., Plokhotnichenko A.M., Glamazda A.Yu., Leontiev V.S., Levitsky I.A. Excitonic energy transfer in polymer wrapped carbon nanotubes in gradually grown nanoassemblies // Phys. Chem. Chem. Phys. – 2014. - Vol. 16. - P. 10914, doi:10.1039/C4CP00776J

8. Zinov'yev M.V., Koval' V.A., Danilenko L.I., Soldatov V.P. Ustanovka dlya izucheniya protsessa nizkotemperaturnoy polzuchesti [Installation for studying the low-temperature creep process] // Strength problems. – 1970. – No.6. – P.92. (in Russian)

9. Soldatov V.P., Kirichenko G.I., Abraimov V.V., Braude I.S., Geidarov V.G. The laws of deformation of an amorphous polyimide (PI) film when it is stretched in the temperature range 1.6–300 K // Low Temp. Phys. – 2016. – Vol. 42. – P. 817, doi:10.1063/1.4963917

10. Kargin V.A., Slonimskiy G.L. Kratkiye ocherki po fiziko-khimii polimerov [Brief essays on the physicochemistry of polymers] - М.: Chemistry, 1967. – 232 р. (in Russian)

11. Lototskaya V.A., Yakovenko L.F., Aleksenko E.N., Abraimov V.V., Wen Zhu Shao Low temperature deformation and strength of polyimide films due to thickness and deformation speed // East. Eur. J. Phys. – 2017. – Vol.4. – No.2. – P.44–52.

12. Braude I.S., Gal’tsov N.N., Geidarov V.G., Kirichenko G.I., Abraimov V.V. Effect of deformation and temperature on the ordering of polyimide PM-A molecules. X-ray data // Low Temp. Phys. – 2016. – Vol. 42. – P. 204, doi:10.1063/1.4944734
Published
2018-06-05
How to Cite
Braude, I., Geidarov, V., & Pogribnaya, Y. (2018). PROCESSES OCCURRING IN THE POLYIMIDE FILMS PM-A (AS KAPTON H) DURING THE DEFORMATION AND COOLING. East European Journal of Physics, 5(2), 49-53. https://doi.org/10.26565/2312-4334-2018-2-06