Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D05: Charged and Ion-Containing Polymers II
3:00 PM–6:00 PM,
Monday, March 6, 2023
Room: Room 128
Sponsoring
Unit:
DPOLY
Chair: Thomas Gartner, Georgia Institute of Technology
Abstract: D05.00013 : Conformational Study of Polyelectrolytes under solvophilic and solvophobic conditions*
5:24 PM–5:36 PM
Presenter:
Anish Gulati
(RWTH Aachen University)
Authors:
Anish Gulati
(RWTH Aachen University)
Carlos G Lopez
(RWTH Aachen University)
Here, we use small-angle scattering behaviour to study the structure of polystyrene sulfonate in solution under solvophobic and solvophilic conditions. We show that a transition from a scaling of the correlation length (ξ) with concentration from ξ ≈ c-1/2 to ξ ≈ c-1/3 occurs as the dielectric constant of the solvent is lowered beyond ε ≈ 25, indicating the partial collapse of PSS chains. This transition is observed under solvophobic and solvophilic conditions. In the latter case, where monomer-monomer interactions are repulsive, chain collapse is thought to arise from attractive forces originating between condensed counterions3.
References:
1. Dobrynin, A., Colby, R. and Rubinstein, M., 1995. Macromolecules, 28(6), pp.1859-1871.
2. Spiteri, M.N., Williams, C.E. and Boué, F., 2007. Macromolecules, 40(18), pp.6679-6691.
3. Jeon, J. and Dobrynin, A.V., 2007. Macromolecules, 40(21), pp.7695-7706.
*German Research Foundation (DFG)
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