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Title: Confinement Effects on Host Chain Dynamics in Polymer Nanocomposite Thin Films

Abstract

Incorporating nanoparticles (NPs) within a polymer host to create polymer nanocomposites (PNCs) while having the effect of increasing the functionality (e.g., sensing, energy conversion) of these materials influences other properties. One challenge is to understand the effects of nanoparticles on the viscosity of nanoscale thick polymer films. A new mechanism that contributes to an enhancement of the viscosity of nanoscale thick polymer/nanoparticle films is identified. We show that while the viscosities of neat homopolymer poly(2-vinylpyridine) (P2VP) films as thin as 50 nm remained the same as the bulk, polymer/nanoparticle films containing P2VP brush-coated gold NPs, spaced 50 nm apart, exhibited unprecedented increases in viscosities of over an order of magnitude. For thicker films or more widely separated NPs, the chain dynamics and viscosities were comparable to the bulk values. These results - NP proximities and suppression of their dynamics - suggest a new mechanism by which the viscosities of polymeric liquids could be controlled for nanoscale applications.

Authors:
 [1]; ORCiD logo [1];  [2];  [3]; ORCiD logo [2]; ORCiD logo [4]
  1. Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
  2. Department of Chemistry, University of Athens, Panepistimiopolis, Zografou, Athens 15771, Greece
  3. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
  4. Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States; National Renewable Energy Laboratory, Golden, Colorado 80401, United States
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1400369
Report Number(s):
NREL/JA-5A00-70315
Journal ID: ISSN 0024-9297
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Resource Relation:
Journal Name: Macromolecules; Journal Volume: 50; Journal Issue: 18
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; nanoparticules; polymers; nanocomposites

Citation Formats

Johnson, Kyle J., Glynos, Emmanouil, Maroulas, Serafeim-Dionysios, Narayanan, Suresh, Sakellariou, Georgios, and Green, Peter F. Confinement Effects on Host Chain Dynamics in Polymer Nanocomposite Thin Films. United States: N. p., 2017. Web. doi:10.1021/acs.macromol.7b01066.
Johnson, Kyle J., Glynos, Emmanouil, Maroulas, Serafeim-Dionysios, Narayanan, Suresh, Sakellariou, Georgios, & Green, Peter F. Confinement Effects on Host Chain Dynamics in Polymer Nanocomposite Thin Films. United States. doi:10.1021/acs.macromol.7b01066.
Johnson, Kyle J., Glynos, Emmanouil, Maroulas, Serafeim-Dionysios, Narayanan, Suresh, Sakellariou, Georgios, and Green, Peter F. Thu . "Confinement Effects on Host Chain Dynamics in Polymer Nanocomposite Thin Films". United States. doi:10.1021/acs.macromol.7b01066.
@article{osti_1400369,
title = {Confinement Effects on Host Chain Dynamics in Polymer Nanocomposite Thin Films},
author = {Johnson, Kyle J. and Glynos, Emmanouil and Maroulas, Serafeim-Dionysios and Narayanan, Suresh and Sakellariou, Georgios and Green, Peter F.},
abstractNote = {Incorporating nanoparticles (NPs) within a polymer host to create polymer nanocomposites (PNCs) while having the effect of increasing the functionality (e.g., sensing, energy conversion) of these materials influences other properties. One challenge is to understand the effects of nanoparticles on the viscosity of nanoscale thick polymer films. A new mechanism that contributes to an enhancement of the viscosity of nanoscale thick polymer/nanoparticle films is identified. We show that while the viscosities of neat homopolymer poly(2-vinylpyridine) (P2VP) films as thin as 50 nm remained the same as the bulk, polymer/nanoparticle films containing P2VP brush-coated gold NPs, spaced 50 nm apart, exhibited unprecedented increases in viscosities of over an order of magnitude. For thicker films or more widely separated NPs, the chain dynamics and viscosities were comparable to the bulk values. These results - NP proximities and suppression of their dynamics - suggest a new mechanism by which the viscosities of polymeric liquids could be controlled for nanoscale applications.},
doi = {10.1021/acs.macromol.7b01066},
journal = {Macromolecules},
number = 18,
volume = 50,
place = {United States},
year = {Thu Sep 07 00:00:00 EDT 2017},
month = {Thu Sep 07 00:00:00 EDT 2017}
}