skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Confined dynamics of grafted polymer chains in solutions of linear polymer

Abstract

Here, we measure the dynamics of high molecular weight polystyrene grafted to silica nanoparticles dispersed in semidilute solutions of linear polymer. Structurally, the linear free chains do not penetrate the grafted corona but increase the osmotic pressure of the solution, collapsing the grafted polymer and leading to eventual aggregation of the grafted particles at high matrix concentrations. Dynamically, the relaxations of the grafted polymer are controlled by the solvent viscosity according to the Zimm model on short time scales. On longer time scales, the grafted chains are confined by neighboring grafted chains, preventing full relaxation over the experimental time scale. Adding free linear polymer to the solution does not affect the initial Zimm relaxations of the grafted polymer but does increase the confinement of the grafted chains. Finally, our results elucidate the physics underlying the slow relaxations of grafted polymer.

Authors:
 [1];  [1];  [2];  [3];  [4];  [1];  [1]
  1. Univ. of Houston, TX (United States). Dept. of Chemical and Biomolecular Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS) outstation Juelich Centre for Neutron Science (JCNS), Forschungszentrum Juelich GmbH
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); Welch Foundation
OSTI Identifier:
1419950
Grant/Contract Number:  
AC02-06CH11357; DMR 1040446
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Macromolecules
Additional Journal Information:
Journal Volume: 50; Journal Issue: 18; Journal ID: ISSN 0024-9297
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Poling-Skutvik, Ryan D., Olafson, Katy N., Narayanan, Suresh, Stingaciu, Laura, Faraone, Antonio, Conrad, Jacinta C., and Krishnamoorti, Ramanan. Confined dynamics of grafted polymer chains in solutions of linear polymer. United States: N. p., 2017. Web. doi:10.1021/acs.macromol.7b01245.
Poling-Skutvik, Ryan D., Olafson, Katy N., Narayanan, Suresh, Stingaciu, Laura, Faraone, Antonio, Conrad, Jacinta C., & Krishnamoorti, Ramanan. Confined dynamics of grafted polymer chains in solutions of linear polymer. United States. doi:10.1021/acs.macromol.7b01245.
Poling-Skutvik, Ryan D., Olafson, Katy N., Narayanan, Suresh, Stingaciu, Laura, Faraone, Antonio, Conrad, Jacinta C., and Krishnamoorti, Ramanan. Mon . "Confined dynamics of grafted polymer chains in solutions of linear polymer". United States. doi:10.1021/acs.macromol.7b01245. https://www.osti.gov/servlets/purl/1419950.
@article{osti_1419950,
title = {Confined dynamics of grafted polymer chains in solutions of linear polymer},
author = {Poling-Skutvik, Ryan D. and Olafson, Katy N. and Narayanan, Suresh and Stingaciu, Laura and Faraone, Antonio and Conrad, Jacinta C. and Krishnamoorti, Ramanan},
abstractNote = {Here, we measure the dynamics of high molecular weight polystyrene grafted to silica nanoparticles dispersed in semidilute solutions of linear polymer. Structurally, the linear free chains do not penetrate the grafted corona but increase the osmotic pressure of the solution, collapsing the grafted polymer and leading to eventual aggregation of the grafted particles at high matrix concentrations. Dynamically, the relaxations of the grafted polymer are controlled by the solvent viscosity according to the Zimm model on short time scales. On longer time scales, the grafted chains are confined by neighboring grafted chains, preventing full relaxation over the experimental time scale. Adding free linear polymer to the solution does not affect the initial Zimm relaxations of the grafted polymer but does increase the confinement of the grafted chains. Finally, our results elucidate the physics underlying the slow relaxations of grafted polymer.},
doi = {10.1021/acs.macromol.7b01245},
journal = {Macromolecules},
number = 18,
volume = 50,
place = {United States},
year = {Mon Sep 11 00:00:00 EDT 2017},
month = {Mon Sep 11 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share: