2019 (3) 3

https://doi.org/10.15407/polymerj.41.03.167

Structure and properties of polyimide-containing organo-inorganic nanocomposites

T.A. Shantalii, S.D. Nesin, K.S. Dragan, I.L. Karpova, S.I. Bochvan, M.M. Minenko, M.V. Rukhailo

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shause, Kyiv, 02160, Ukraine

Polym. J., 2019, 41, no. 3: 167-172.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

The heat-resistant polymeric nanocomposites based on the branched polyimide matrix and tetraethoxysilane were synthesized and investigated. The samples were received on the basis of pyromellitic  dianhydride and a mixture of diamines: 4,4 -diaminodiphenyl ether and 3,5-diaminobenzoic acid in a ratio (9: 1, 7: 3, 1: 1) with the addition of tetraethoxysilane (TEOS) in the amount of 2,5–50,0 %. The influence of the branching of the polyimide matrix and the content of the inorganic component on the structure and properties of nanocomposites was studied by X-ray diffraction analysis, dielectric spectroscopy and thermogravimetric analysis. The received materials are characterized by high thermal resistance, low dielectric permeability. Established structural dependences for these composites allow us to make a conclusion about the influence polyimide matrix structure and the amount of TEOS introduced into the system for the formation of the inorganic component, on the structure and as a consequence of the properties of polyimide-containing composites. The combination of the largest branching in the polyimide matrix with low content of the inorganic component makes it possible to obtain composites with low values   of dielectric permeability. The received nanocomposites are characterized by high thermal resistance. The presence of the branching and inorganic component in the polyimide matrix does not significantly affect the thermal characteristics of the composites. We can make a conclusion about   almost the same thermal stability of the original PI and composites, and the possibility of their practical application in high temperatures.

Key words: polyimide, nanocomposite, structure, dielectric constant, thermal stability.

References

1. Musto P., Ragosta G., Scarinizi G., Mascia L. Polymer, 2004. 45, N5: 1697–1706. https://doi.org/10.1016/j.polymer.2003.12.044
2. Privalko V.P., Shantalii T.A., Privalko E.G. Chapter 4 in : Science and Technology of Polymer-Composites: from Nano- to Micro-scale / Ed. by K Friedrich, S. Fakirov and Z. Zhang]. Kluwer, 2005: 63–76.
3. Fomenko A.O., Shantalii T.A., Klepko V.V. XIII Ukrainska konferentsiia z vysokomolekuliarnykh spoluk, Kyiv, 7-10 zhovtnia 2013: 563–565.
4. Lypatov Yu.S., Shylov V.V., Homza Yu.P., Kruhliak N.E. Kyev: Nauk. dumka, 1982: 396.
5. Toroptseva A.M., Belogorodskaya K.V., Bondarenko V.M. Laboratornyiy praktikum po himii i tehnologii vyisokomolekulyarnyih soedineniyyu. M.: Himiya, 1972: 415.
6. Byuller K.-U. Teplo- i termostoykie polimeryi. M.: Himiya, 1984: 1056.
7.  Kozak N.V., Shantalii T.A., Drahan K.S., Vorontsova L.O., Klepko V.V. zhurn., 2015. 37, no. 3: 229–234. https://doi.org/10.15407/polymerj.37.03.229
8.  Shantaliy T.A., Drahan E.S., Fomenko A.A., Klepko V.V.  zhurn., 2009. 31, no. 4: 353–357. https://doi.org/10.1007/s10357-009-1671-9