Identification of rheological properties of poly(ethylene oxide) - water solutions
Authors:
- Ryszard Wójtowicz,
- Katarzyna Kocewiak,
- Andrey A. Lipin
Abstract
In the paper results of investigations of rheological properties for selected PEO-water so-lutions are presented. On the basis of measurements, carried out with use of rotational viscosime-ter values of shear stresses were determined in the relatively wide range of shear rates. Rheologi-cal curves were described by the Ostwald de Waele model (or so-called power-law). The model co-efficients such as the fluid consistency coefficient k and the flow behavior index n were deter-mined using Levenberg−Marquardt algorithm for nonlinear estimation. The influence of temper-ature on properties and behavior examined non-Newtonian fluids was also determined. Results were processed in the curve shift parameter at. Experiments shown a significant effect of poly(ethylene oxide) concentration cPEO on rheological properties of examined solutions. For the lowest concentration (cPEO=1.2%) solutions exhibited properties similar to Newtonian fluids with values of n close to 1. With increasing of PEO concentration in water (cPEO=2.4-4.8%), solutions exhibited properties as non - Newtonian fluids, pseudoplastic, without yield limit. In these cases values of n were below unity and for the highest concentration (cPEO=4.8%) belonged to the range of n=0.5694-0.7536, depending on the temperature. Results of investigations can be used during numerical simulations, design and optimization of industrial equipment, working with fluids of this kind, including mixing vessels, columns or heat exchangers.
- Record ID
- CUTe0b5d83775a5421a9ef87b6178201820
- Publication categories
- ;
- Author
- Other language title versions
- Opredelenie reologičeskih svojstv rastvorov poliètilenoksid - voda
- Journal series
- IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA I KHIMICHESKAYA TEKHNOLOGIYA, ISSN 0579-2991, e-ISSN 2500-3070
- Issue year
- 2020
- Vol
- 63
- No
- 9
- Pages
- 82-87
- Other elements of collation
- tab.; wykr.; Bibliografia (na s.) - 86-87; Bibliografia (liczba pozycji) - 31; Oznaczenie streszczenia - Streszcz. ros., ang.; Numeracja w czasopiśmie - T. 63, No. 9
- Keywords in English
- rheological properties, non-Newtonian fluids, fluid viscosity, poly(ethylene oxide), PEO, Ostwald de Waele model
- DOI
- DOI:10.6060/ivkkt.20206309.6236 Opening in a new tab
- URL
- http://journals.isuct.ru/ctj/article/view/2882 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 20
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTe0b5d83775a5421a9ef87b6178201820/
- URN
urn:pkr-prod:CUTe0b5d83775a5421a9ef87b6178201820
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.