Phase stability and dynamics of entangled polymer-nanoparticle composites.

Handle URI:
http://hdl.handle.net/10754/596809
Title:
Phase stability and dynamics of entangled polymer-nanoparticle composites.
Authors:
Mangal, Rahul; Srivastava, Samanvaya; Archer, Lynden A
Abstract:
Nanoparticle-polymer composites, or polymer-nanoparticle composites (PNCs), exhibit unusual mechanical and dynamical features when the particle size approaches the random coil dimensions of the host polymer. Here, we harness favourable enthalpic interactions between particle-tethered and free, host polymer chains to create model PNCs, in which spherical nanoparticles are uniformly dispersed in high molecular weight entangled polymers. Investigation of the mechanical properties of these model PNCs reveals that the nanoparticles have profound effects on the host polymer motions on all timescales. On short timescales, nanoparticles slow-down local dynamics of the host polymer segments and lower the glass transition temperature. On intermediate timescales, where polymer chain motion is typically constrained by entanglements with surrounding molecules, nanoparticles provide additional constraints, which lead to an early onset of entangled polymer dynamics. Finally, on long timescales, nanoparticles produce an apparent speeding up of relaxation of their polymer host.
Citation:
Mangal R, Srivastava S, Archer LA (2015) Phase stability and dynamics of entangled polymer–nanoparticle composites. Nat Comms 6: 7198. Available: http://dx.doi.org/10.1038/ncomms8198.
Publisher:
Nature Publishing Group
Journal:
Nature Communications
KAUST Grant Number:
KUS–C1018–02
Issue Date:
5-Jun-2015
DOI:
10.1038/ncomms8198
PubMed ID:
26044723
PubMed Central ID:
PMC4468852
Type:
Article
ISSN:
2041-1723
Sponsors:
This work was supported by the National Science Foundation, Award No. DMR–1006323 and by Award No. KUS–C1018–02, made by the King Abdullah University of Science and Technology (KAUST). Use of the Advanced Photon Source, operated by the Argonne National Laboratory, was supported by the US DOE under Contract No. DE–AC02–06CH11357. We acknowledge Mr Xiaobing Zuo, Assistant Physicist, Argonne National Laboratory for helpful discussions.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorMangal, Rahulen
dc.contributor.authorSrivastava, Samanvayaen
dc.contributor.authorArcher, Lynden Aen
dc.date.accessioned2016-02-21T08:51:07Zen
dc.date.available2016-02-21T08:51:07Zen
dc.date.issued2015-06-05en
dc.identifier.citationMangal R, Srivastava S, Archer LA (2015) Phase stability and dynamics of entangled polymer–nanoparticle composites. Nat Comms 6: 7198. Available: http://dx.doi.org/10.1038/ncomms8198.en
dc.identifier.issn2041-1723en
dc.identifier.pmid26044723en
dc.identifier.doi10.1038/ncomms8198en
dc.identifier.urihttp://hdl.handle.net/10754/596809en
dc.description.abstractNanoparticle-polymer composites, or polymer-nanoparticle composites (PNCs), exhibit unusual mechanical and dynamical features when the particle size approaches the random coil dimensions of the host polymer. Here, we harness favourable enthalpic interactions between particle-tethered and free, host polymer chains to create model PNCs, in which spherical nanoparticles are uniformly dispersed in high molecular weight entangled polymers. Investigation of the mechanical properties of these model PNCs reveals that the nanoparticles have profound effects on the host polymer motions on all timescales. On short timescales, nanoparticles slow-down local dynamics of the host polymer segments and lower the glass transition temperature. On intermediate timescales, where polymer chain motion is typically constrained by entanglements with surrounding molecules, nanoparticles provide additional constraints, which lead to an early onset of entangled polymer dynamics. Finally, on long timescales, nanoparticles produce an apparent speeding up of relaxation of their polymer host.en
dc.description.sponsorshipThis work was supported by the National Science Foundation, Award No. DMR–1006323 and by Award No. KUS–C1018–02, made by the King Abdullah University of Science and Technology (KAUST). Use of the Advanced Photon Source, operated by the Argonne National Laboratory, was supported by the US DOE under Contract No. DE–AC02–06CH11357. We acknowledge Mr Xiaobing Zuo, Assistant Physicist, Argonne National Laboratory for helpful discussions.en
dc.publisherNature Publishing Groupen
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visiten
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titlePhase stability and dynamics of entangled polymer-nanoparticle composites.en
dc.typeArticleen
dc.identifier.journalNature Communicationsen
dc.identifier.pmcidPMC4468852en
dc.contributor.institutionSchool of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, USA.en
dc.contributor.institutionInstitute for Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, USA.en
kaust.grant.numberKUS–C1018–02en

Related articles on PubMed

All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.