Publication detail

Effect of Nanoparticle Organization on Molecular Mobility and Mechanical Properties of Polymer Nanocomposites

ONDREÁŠ, F. LEPCIO, P. ZBONČÁK, M. ZÁRYBNICKÁ, K. GOVAERT, L. JANČÁŘ, J.

Original Title

Effect of Nanoparticle Organization on Molecular Mobility and Mechanical Properties of Polymer Nanocomposites

Type

journal article in Web of Science

Language

English

Original Abstract

Influence of nanoparticle (NP) spatial organization on relaxation and mechanical properties of polymer nanocomposites (PNCs) was investigated. For the first time, the properties of PNCs with various nanostructures at the constant chemical composition were related to their experimentally determined structural parameters—effective interfacial surface and interparticle distance. Segmental scale reinforcement active below and above glass transition was attributed to the immobilization and frustration of polymer segments caused by attractive polymer–particle interactions. A novel reinforcing mechanism of chain bound clusters related to their internal structure was revealed while negligible reinforcement from NP–NP interactions of contact aggregates was found. The mechanical response of PNCs was correlated with appropriate relaxation properties. It provided the first experimental proof that deformation yielding dynamics of PNCs is controlled by glass transition segmental mobility. Main features of various NP spatial organizations were characterized. Chain bound clusters showed the most significant reinforcement above the glass transition temperature (Tg). Moreover, the hierarchical nature of chain bound clusters caused broadening of the ductile response compared to other nanostructures and also to the neat matrix. The most pronounced enhancement of elastic modulus, yield stress, and creep durability was found for individually dispersed NPs. The acquired nanostructure–property relationships will provide a foundation for the future design of hierarchic and multidomain nanocomposites.

Keywords

property relationships, reinforcing mechanism, frustrated dynamics, nanoparticle-polymer interactions, chain bound clusters, relaxation and mechanical properties, PMMA, silica

Authors

ONDREÁŠ, F.; LEPCIO, P.; ZBONČÁK, M.; ZÁRYBNICKÁ, K.; GOVAERT, L.; JANČÁŘ, J.

Released

13. 8. 2019

Publisher

American Chemical Society

Location

WASHINGTON, DC 20036 USA

ISBN

0024-9297

Periodical

MACROMOLECULES

Year of study

52

Number

16

State

United States of America

Pages from

6250

Pages to

6259

Pages count

10

URL

https://pubs.acs.org/doi/10.1021/acs.macromol.9b01197

BibTex

@article{BUT158486,
  author="František {Ondreáš} and Petr {Lepcio} and Marek {Zbončák} and Klára {Zárybnická} and Leon E. {Govaert} and Josef {Jančář}",
  title="Effect of Nanoparticle Organization on Molecular Mobility and Mechanical Properties of Polymer Nanocomposites",
  journal="MACROMOLECULES",
  year="2019",
  volume="52",
  number="16",
  pages="6250--6259",
  doi="10.1021/acs.macromol.9b01197",
  issn="0024-9297",
  url="https://pubs.acs.org/doi/10.1021/acs.macromol.9b01197"
}