Jump to main content
Jump to site search

Volume 186, 2016
Previous Article Next Article

Revealing nanocomposite filler structures by swelling and small-angle X-ray scattering

Author affiliations

Abstract

Polymer nanocomposites are used widely, mainly for the industrial application of car tyres. The rheological behavior of such nanocomposites depends in a crucial way on the dispersion of the hard filler particles – typically silica nanoparticles embedded in a soft polymer matrix. It is thus important to assess the filler structure, which may be quite difficult for aggregates of nanoparticles of high polydispersity, and with strong interactions at high loading. This has been achieved recently using a coupled TEM/SAXS structural model describing the filler microstructure of simplified industrial nanocomposites with grafted or ungrafted silica of high structural disorder. Here, we present an original method capable of reducing inter-aggregate interactions by swelling of nanocomposites, diluting the filler to low-volume fractions. Note that this is impossible to reach by solid mixing due to the large differences in viscoelasticity between the composite and the pure polymer. By combining matrix crosslinking, swelling in a good monomer solvent, and post-polymerization of these monomers, it is shown that it is possible to separate the filler into small aggregates. The latter have then been characterized by electron microscopy and small-angle X-ray scattering, confirming the conclusions of the above mentioned TEM-SAXS structural model applied directly to the highly loaded cases.

Back to tab navigation

Publication details

The article was received on 27 Jul 2015, accepted on 01 Sep 2015 and first published on 01 Sep 2015


Article type: Paper
DOI: 10.1039/C5FD00117J
Author version
available:
Download author version (PDF)
Faraday Discuss., 2016,186, 295-309

  •   Request permissions

    Revealing nanocomposite filler structures by swelling and small-angle X-ray scattering

    G. P. Baeza, A. Genix, N. Paupy-Peyronnet, C. Degrandcourt, M. Couty and J. Oberdisse, Faraday Discuss., 2016, 186, 295
    DOI: 10.1039/C5FD00117J

Search articles by author

Spotlight

Advertisements