From ionic clusters dynamics to network constraints in ionic polymer solutions
[3];
[4];
[5];
[5];
[6];
- Clemson Univ., SC (United States); Appalachian State University, Boone, NC (United States)
- Clemson Univ., SC (United States)
- Clemson Univ., SC (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Clemson Univ., SC (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Physical networks formed by ionizable polymers with ionic clusters as crosslinks are controlled by coupled dynamics that transcend from ionic clusters through chain motion to macroscopic response. Here, the coupled dynamics, across length scales, from the ionic clusters to the networks in toluene swollen polystyrene sulfonate networks, were directly correlated, as the electrostatic environment of the physical crosslinks was altered. The multiscale insight is attained by coupling neutron spin echo measurements with molecular dynamics simulations, carried out to times typical of relaxation of polymers in solutions. The experimental dynamic structure factor is in outstanding agreement with the one calculated from computer simulations, as the networks are perturbed by elevating the temperature and changing the electrostatic environment. In toluene, the long-lived clusters remain stable over hundreds of ns across a broad temperature range, while the polymer network remains dynamic. In conclusion, though the size of the clusters changes as the dielectric constant of the solvent is modified through the addition of ethanol, they remain stable but morph, enhancing the polymer chain dynamics.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
- Grant/Contract Number:
- NA0003525; AC02-05CH11231; SC0019284
- OSTI ID:
- 2333726
- Alternate ID(s):
- OSTI ID: 2394716; OSTI ID: 2473913
- Report Number(s):
- SAND--2024-04067J
- Journal Information:
- Physical Review. E, Journal Name: Physical Review. E Journal Issue: 3 Vol. 109; ISSN 2470-0045
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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