Interplay between local dynamics and mechanical reinforcement in glassy polymer nanocomposites

Holt, Adam P.; Bocharova, Vera; Cheng, Shiwang; Kisliuk, Alexander M.; Ehlers, Georg; Mamontov, Eugene; Novikov, Vladimir N.; Sokolov, Alexei P.

doi:10.1103/PhysRevMaterials.1.062601

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

Journal Article · Fri Nov 17 00:00:00 EST 2017 · Physical Review Materials

DOI:https://doi.org/10.1103/PhysRevMaterials.1.062601· OSTI ID:1410906

Holt, Adam P. ^[1];

^[2];

^[2]; Kisliuk, Alexander M. ^[2];

^[3];

^[4]; Novikov, Vladimir N. ^[5];

^[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
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical & Engineering Materials Division
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
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

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.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1410906

Alternate ID(s):: OSTI ID: 1409229

Journal Information:: Physical Review Materials, Vol. 1, Issue 6; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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

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