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Title: Nanoscale Particle Motion in Attractive Polymer Nanocomposites

Abstract

Using x-ray photon correlation spectroscopy, we examined slow nanoscale motion of silica nanoparticles individually dispersed in entangled poly (ethylene oxide) melt at particle volume fractions up to 42 %. The nanoparticles, therefore, serve as both fillers for the resulting attractive polymer nanocomposites and probes for the network dynamics therein. The results show that the particle relaxation closely follows the mechanical reinforcement in the nanocomposites only at the intermediate concentrations below the critical value for the chain confinement. Quite unexpectedly, the relaxation time of the particles does not further slowdown at higher volume fractions- when all chains are practically on the nanoparticle interface- and decouples from the elastic modulus of the nanocomposites that further increases orders of magnitude.

Authors:
 [1];  [2];  [1];  [3]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1422390
Alternate Identifier(s):
OSTI ID: 1411502
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 23; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Senses, Erkan, Narayanan, Suresh, Mao, Yimin, and Faraone, Antonio. Nanoscale Particle Motion in Attractive Polymer Nanocomposites. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.237801.
Senses, Erkan, Narayanan, Suresh, Mao, Yimin, & Faraone, Antonio. Nanoscale Particle Motion in Attractive Polymer Nanocomposites. United States. doi:10.1103/PhysRevLett.119.237801.
Senses, Erkan, Narayanan, Suresh, Mao, Yimin, and Faraone, Antonio. Wed . "Nanoscale Particle Motion in Attractive Polymer Nanocomposites". United States. doi:10.1103/PhysRevLett.119.237801. https://www.osti.gov/servlets/purl/1422390.
@article{osti_1422390,
title = {Nanoscale Particle Motion in Attractive Polymer Nanocomposites},
author = {Senses, Erkan and Narayanan, Suresh and Mao, Yimin and Faraone, Antonio},
abstractNote = {Using x-ray photon correlation spectroscopy, we examined slow nanoscale motion of silica nanoparticles individually dispersed in entangled poly (ethylene oxide) melt at particle volume fractions up to 42 %. The nanoparticles, therefore, serve as both fillers for the resulting attractive polymer nanocomposites and probes for the network dynamics therein. The results show that the particle relaxation closely follows the mechanical reinforcement in the nanocomposites only at the intermediate concentrations below the critical value for the chain confinement. Quite unexpectedly, the relaxation time of the particles does not further slowdown at higher volume fractions- when all chains are practically on the nanoparticle interface- and decouples from the elastic modulus of the nanocomposites that further increases orders of magnitude.},
doi = {10.1103/PhysRevLett.119.237801},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 23,
volume = 119,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 5 works
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