№3 (2017) 5
https://doi.org/10.15407/polymerj.39.03.177
Viscosity of solution of polyamic acid based on card diamines filled by carbon nanotubes
T.A. Shantalii, I.L. Karpova, K.S. Dragan, V.V. Klepko
Institute of Macromolecular Chemistry NAS of Ukraine
48, Kharkivs’ke shose, Kyiv, 02160, Ukraine
Polym. J., 2017, 39, № 3: 177-182.
Section: Structure and properties.
Language: Ukrainian.
Abstract:
Reseach of rheological properties of solutions of polyamic acid (PAA) based on pyromellitic dianhydride and 9,9-bis (4-aminophenyl) -fluorene (anilinfluorene) containing card fragment filled with carbon nanotubes (CNT) was conducted. The presence of such a volumetric structural unit determines the non-Newtonian character of the flow of concentrated solutions PAA, as well as the presence of an anomaly of the viscosity of dispersions of PAA with CNT. Introduction of CNT into solution of PAA leads to a decrease of the viscosity of the system, regardless of the concentration. When a CNT of less to 0.5% is added to the solution, we observe gradual decrease of the viscosity of dispersions, while an increase in the CNT content up to 1,0 % leads to a gradual increase of viscosity. Character of flow of dispersions of PAA–CNT changes with increasing content of CNT and does not depend on concentration of solutions of PAA.
Key words: polyamic acid, carbon nanotubes, viscosity, flow character, rheological properties.
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