Hydrodynamic interaction within star-branched macromolecules

Autor:	Riddhi Chakraborty, Jeffrey Giacomin, Myong Chol Pak, Kwang-Il Kim, Mona Kanso
Rok vydání:	2022
Předmět:	Fluid Flow and Transfer Processes Mechanics of Materials Mechanical Engineering Computational Mechanics Condensed Matter Physics
Zdroj:	Physics of Fluids. 34:093114
ISSN:	1089-7666 1070-6631
DOI:	10.1063/5.0120117
Popis:	Recent work arrived at expressions for the complex viscosity of a suspension of star-branched macromolecules [Coombs, Phys Fluids, 33, 093111 (2021)] using general rigid bead-rod theory without hydrodynamic interaction. In this work, we advance the theory by accounting for intramolecular interactions modeled with the interferences of Stokes flow solvent velocity profiles between adjacent beads. We derive the analytical expression for the complex viscosity of a suspension of four-arm star-branched macromolecules as a function of the number of beads in each arm [Formula: see text] and of the hydrodynamic interaction parameter [Formula: see text]. We test our comprehensive theory against complex viscosity measurements of a cis-polybutadiene silicon-centered four-arm star suspension. We find the incorporation of hydrodynamic interaction improves the fit to complex viscosity measurements.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8aad7ed245ff0746c94ae936ceffb4d3 https://doi.org/10.1063/5.0120117 Zobrazit plný text záznamu