2015 (3) 2

https://doi.org/10.15407/polymerj.37.03.229

Molecular mobility in the polyimide based organic-inorganic composites

N.V. Kozak, T.A. Shantalii, K.S. Drahan, L.O. Vorontsova, V.V. Klepko

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shose, Kyiv, 02160, Ukraine

Polym. J., 2015, 37, no. 3: 229-234.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

Polyimide contained organic-inorganic composites based on pyromellitic dianhydride, diaminodiphenyl ether, diaminobenzoic asid and tetraethoxysilane (TEOS) were analyzed using EPR spectroscopy and optical microscopy. Presence of causes the polyimide chain branching. This affects the mobility of the polyimide matrix. Analysis of nitroxyl paramagnetic probe TEMPO rotational diffusion reveals the dynamic heterogeneity of the systems because of their structural inhomogeneity. Optical micro images show that introduction of TEOS into polyimide is accompanied with formation in the system of micro heterogeneities. Their mean size and quantity depend on inorganic part content. It was found that the sample with 5 % ТЕОS content has most uniform distribution of inorganic component and according to paramagnetic probe data it is characterized by maximum loosening of the system.

Keywords: polyimide, organic-inorganic composite, nitroxyl paramagnetic probe, EPR.

Література

1. Ahmad. Z., Mark J.E. // Chem. Mater. – 2001.– 13. – P. 3320–3330.
2. Privalko V.P., T.A. Shantalii, and E.G. Privalko Chapter 4 in : Science and Technology of Polymer-Composites: from Nano- to Microscale. / Ed. by K Friedrich, S. Fakirov and Z. Zhang. – Kluwer, 2005. – С. 63–76.
3. Привалко В.П., Шанталий Т.А., Привалко Е.Г. // Наносистеми, наноматеріали, нанотехнології. – 2004.– 2, № 1. – С. 303–314.
4. Шанталий Т.А., Драган Е.С., Фоменко А.А., Клеп- ко В.В. // Полімер. журн. – 2009. – 31, № 4. – С. 353–357.
5. Козак Н.В., Шанталій Т.А., Драган К.С. // Полімер. журн. – 2011. – 33, № 1. – С. 32–37.
6. Козак Н.В., Шанталій Т.А., Лобко Є.В., Драган К.С., Клепко В.В. // Полімер. журн. – 2011. – 33, № 4. – С. 356–360.
7. Veksli Z., Andreis M., Rakvin B. ESR spectroscopy for the study of polymer heterogeneity // Progress in Polym. Sci.–2000.– 28, No 5. – P. 507–557.
8. Вассерман А.М, Коварский А.Л. Спиновые метки и зонды в физико-химии полимеров. – М: Наука, 1986. – 245 с.
9. Фоменко А.О., Шанталій Т.А., Клепко В.В. Діелектричні властивості імідвмісних нанокомпозитів. // XIII Укр. конф. з високомолекуляр. сполук. – Київ, 7–10 жовтня 2013. – С. 563–565.
10. Vorobiev A.Kh., Chumakova N.A. Chapter 3 in : Nitroxides – Theory, Experiment and Applications (Ed. by A. I. Kokorin). – InTech, 2012. – P. 57–111.
11. Advanced ESR methods in polymer research / Еd by S.Schlick. – NJ:Wiley, 2006. – 359 p.