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Title: Interplay between local dynamics and mechanical reinforcement in glassy polymer nanocomposites

Abstract

The modification of polymer dynamics in the presence of strongly interacting nanoparticles has been shown to significantly change themacroscopic properties above the glass transition temperature of polymer nanocomposites (PNCs). However, much less attention has been paid to changes in the dynamics of glassy PNCs. Analysis of neutron and light scattering data presented herein reveals a surprising enhancement of local dynamics, e.g., fast picosecond and secondary relaxations, in glassy PNCs accompanied with a strengthening of mechanical modulus. Here we ascribe this counter-intuitive behavior to the complex interplay between chain packing and stretching within the interfacial layer formed at the polymer-nanoparticle interface.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [3]; ORCiD logo [4];  [5]; ORCiD logo [6]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical & Engineering Materials Division
  5. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
  6. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1410906
Alternate Identifier(s):
OSTI ID: 1409229
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 6; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; polymer nanocomposites; polymer dynamics; mechanical reinforcement; quasi-elastic neutron scattering; Brillouin scattering

Citation Formats

Holt, Adam P., Bocharova, Vera, Cheng, Shiwang, Kisliuk, Alexander M., Ehlers, Georg, Mamontov, Eugene, Novikov, Vladimir N., and Sokolov, Alexei P. Interplay between local dynamics and mechanical reinforcement in glassy polymer nanocomposites. United States: N. p., 2017. Web. doi:10.1103/PhysRevMaterials.1.062601.
Holt, Adam P., Bocharova, Vera, Cheng, Shiwang, Kisliuk, Alexander M., Ehlers, Georg, Mamontov, Eugene, Novikov, Vladimir N., & Sokolov, Alexei P. Interplay between local dynamics and mechanical reinforcement in glassy polymer nanocomposites. United States. doi:10.1103/PhysRevMaterials.1.062601.
Holt, Adam P., Bocharova, Vera, Cheng, Shiwang, Kisliuk, Alexander M., Ehlers, Georg, Mamontov, Eugene, Novikov, Vladimir N., and Sokolov, Alexei P. Fri . "Interplay between local dynamics and mechanical reinforcement in glassy polymer nanocomposites". United States. doi:10.1103/PhysRevMaterials.1.062601.
@article{osti_1410906,
title = {Interplay between local dynamics and mechanical reinforcement in glassy polymer nanocomposites},
author = {Holt, Adam P. and Bocharova, Vera and Cheng, Shiwang and Kisliuk, Alexander M. and Ehlers, Georg and Mamontov, Eugene and Novikov, Vladimir N. and Sokolov, Alexei P.},
abstractNote = {The modification of polymer dynamics in the presence of strongly interacting nanoparticles has been shown to significantly change themacroscopic properties above the glass transition temperature of polymer nanocomposites (PNCs). However, much less attention has been paid to changes in the dynamics of glassy PNCs. Analysis of neutron and light scattering data presented herein reveals a surprising enhancement of local dynamics, e.g., fast picosecond and secondary relaxations, in glassy PNCs accompanied with a strengthening of mechanical modulus. Here we ascribe this counter-intuitive behavior to the complex interplay between chain packing and stretching within the interfacial layer formed at the polymer-nanoparticle interface.},
doi = {10.1103/PhysRevMaterials.1.062601},
journal = {Physical Review Materials},
number = 6,
volume = 1,
place = {United States},
year = {Fri Nov 17 00:00:00 EST 2017},
month = {Fri Nov 17 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
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