Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session D25: Rheology and Mechanics of Polymer Systems
3:00 PM–5:48 PM,
Monday, March 4, 2024
Room: 101F
Sponsoring
Unit:
DPOLY
Chair: Aman Agrawal
Abstract: D25.00010 : Recent Advances in Polymer Viscoelasticity From General Rigid Bead-Rod Theory
4:48 PM–5:00 PM
Presenter:
Alan Jeffrey Giacomin
(University of Reno, Nevada)
Authors:
Mona Kanso
(Massachusetts Institute of Technology)
Alan Jeffrey Giacomin
(University of Reno, Nevada)
orientation distribution of the macromolecules. When exploring how macromolecular
architecture affects the elasticity of a polymeric liquid, we find general rigid bead-rod theory
to be both versatile and accurate. This theory sculpts macromolecules using beads and rods.
Whereas beads represent points of Stokes flow resistances, the rods represent rigid
separations. In this way, how the shape of the macromolecule affects its rheological behavior
in suspension is determined. Our work shows the recent advances in polymer viscoelasticity
using general rigid bead-rod theory, including advances applied on different viruses,
including coronavirus. We calculate the rotational diffusivity of the viral suspensions, from
first principles, using general rigid bead-rod theory. We do so by beading the spherical
polymer, and then also by replacing each of its bulbous spikes with a single bead. We use
energy minimization for the spreading and positioning of the spikes, charged identically,
over the oblate or prolate capsids. We use general rigid bead-rod theory to explore the role
of ellipticity on its rotational diffusivity, the transport property around which its cell
attachment revolves.
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