Rheological behavior of aqueous polyacrylamide solutions determined by dissipative particle dynamics and comparison to experiments

Autor:	B. Herzhaft, M. Yiannourakou, N. Pannacci, Bernard Rousseau
Rok vydání:	2012
Předmět:	chemistry.chemical_compound Materials science Classical mechanics Aqueous solution chemistry Shear (geology) Rheology Rheometer Microfluidics Polyacrylamide Dissipative particle dynamics General Physics and Astronomy Thermodynamics
Zdroj:	EPL (Europhysics Letters). 97:34007
ISSN:	1286-4854 0295-5075
Popis:	Based on molecular-dynamics simulations and experimental data, a new coarse-grained forcefield is proposed for the polyacrylamide (PAM)-water system that allows to study dynamical properties of chains at several concentrations with molecular weight up to 17000 g/mol. Non-equilibrium simulations were used to compute relative viscosities, enabling a direct comparison with experimental values. High-shear-rate measurements for low-molecular-weight PAM (10000 g/mol) were done using a microfluidic rheometer Rheosense to decrease the gap between experimental and simulated shear rates. DPD simulations reproduced qualitatively and quantitatively structural properties as well as rheological properties in the dilute regime and qualitatively in the semi-dilute regime.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::544b16af242dcab0264caa68ef05394f https://doi.org/10.1209/0295-5075/97/34007 Zobrazit plný text záznamu