Publication detail

Translation of segment scale stiffening into macro scale reinforcement in polymer nanocomposites

ZBONČÁK, M. ONDREÁŠ, F. UHLÍŘ, V. LEPCIO, P. MICHALIČKA, J. JANČÁŘ, J.

Original Title

Translation of segment scale stiffening into macro scale reinforcement in polymer nanocomposites

Type

journal article in Web of Science

Language

English

Original Abstract

Structuring of polymer nanocomposites (PNCs) with an aid of relatively weak external magnetic fields has been studied as a method for control of the nano- and microstructure. Magnetic nanoparticles (NPs) were assembled into high aspect ratio one-dimensional strings and unidirectionally oriented with magnetic field (B=0-50 mT) within the photopolymer matrix. The effect of the anisotropic MNPs assemblies on the mechanical properties was studied over wide temperature range for the first time. Impact of various reinforcing mechanisms was distinguished with respect to the position of the glass transition temperature (Tg). The reinforcing effect exhibits temperature dependency with a maximum ~65°C above the glass transition and only negligible effect below the Tg. In addition, significant directional anisotropy of stiffness was observed. Composites micromechanics was applied to interpret the orientation and size dependent reinforcement of PNCs and temperature dependent stiffness of the polymer-MNPs structures was quantified. The presence of polymer chains with altered dynamics surrounding the MNPs inside the anisotropic assemblies was proposed to be essential nano-scale mechanism mediating the stress transfer and contributing to mechanical robustness of the hybrid structures and PNCs.

Keywords

self-assembly; nanocomposites; structure-property relationships

Authors

ZBONČÁK, M.; ONDREÁŠ, F.; UHLÍŘ, V.; LEPCIO, P.; MICHALIČKA, J.; JANČÁŘ, J.

Released

2. 3. 2020

Publisher

Wiley

ISBN

0032-3888

Periodical

Polymer Engineering and Science

Year of study

60

Number

3

State

United States of America

Pages from

587

Pages to

596

Pages count

10

URL

https://onlinelibrary.wiley.com/doi/abs/10.1002/pen.25317

BibTex

@article{BUT160845,
  author="Marek {Zbončák} and František {Ondreáš} and Vojtěch {Uhlíř} and Petr {Lepcio} and Jan {Michalička} and Josef {Jančář}",
  title="Translation of segment scale stiffening into macro scale reinforcement in polymer nanocomposites",
  journal="Polymer Engineering and Science",
  year="2020",
  volume="60",
  number="3",
  pages="587--596",
  doi="10.1002/pen.25317",
  issn="0032-3888",
  url="https://onlinelibrary.wiley.com/doi/abs/10.1002/pen.25317"
}