JCP Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

You Tube Flickr Twitter UniPHY Group iResearch App Facebook

Journal of Chemical Physics / Volume 133 / Issue 2 / ARTICLES / Polymers and Complex Systems

J. Chem. Phys. 133, 024903 (2010); http://dx.doi.org/10.1063/1.3447919 (10 pages)

Strain induced anisotropies in silica polydimethylsiloxane composites

G. J. Schneider1 and D. Göritz2

1Institut für Festkörperforschung, Neutronenstreuung and Jülich Centre for Neutron Science, Forschungszentrum Jülich, 52425 Jülich, Germany
2Institut für Physik, Universität Regensburg, 93040 Regensburg, Germany

View MapView Map

(Received 31 August 2009; accepted 13 May 2010; published online 14 July 2010)

Structural changes of silica in polydimethylsiloxane rubber induced by external forces were studied by means of small-angle X-ray scattering experiments. The silica fraction varies from 9 up to 23 vol% and the elongation ratio from 1 to 3. Within the q-range of 0.02 nm−1<q<1 nm−1 the primary particles and the clusters which consist of these basic units could be resolved. The scattering diagrams of the samples without external deformation are radially symmetric and, in particular, the mass fractal dimension does not depend on the silica fraction. Due to the deformation the contours of the two-dimensional scattering diagrams become elliptic. A model independent analysis of the intensity as a function of the q-vector perpendicular and parallel to the deformation axis revealed that the microscopic cluster size is systematically increased by the macroscopic external deformation. In particular, the deformation ratio at the microscopic and the macroscopic length scale is very similar. The mass fractal dimension, as obtained by the slope of the scattering curve, increases significantly with growing deformation ratio, but is the same in vertical and horizontal directions. A simple relation derived for the crossover from self-similar to self-affine fractals can be used to relate the cluster sizes perpendicular and parallel to the deformation and the mass fractal dimension. By that means, it is demonstrated that the mean number of particles within each aggregate is constant, although the rubber was stretched up to a factor of 3.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL SECTION
    1. Samples
    2. SAXS experiments
  3. THEORY
  4. RESULTS AND DISCUSSION
  5. CONCLUSION

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

composite materials, deformation, elongation, fractals, rubber, silicon compounds, X-ray scattering

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3447919

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    R. Hill, Phys. Rev. Lett. 96, 216001 (2006).

    D. J. Read and T. C. B. McLeish, Phys. Rev. Lett. 79, 87 (1997).

    D. J. Read and T. C. B. McLeish, Phys. Rev. Lett. 80, 5450 (1998).

    E. Straube, V. Urban, W. Pyckhout-Hintzen, D. Richter, and C. J. Glinka, Phys. Rev. Lett. 74, 4464 (1995).

    G. J. Schneider, J. Chem. Phys. 130, 234912 (2009)JCPSA6000130000023234912000001.

    S. K. Friedlander, H. D. Jang, and K. H. Ryu, Appl. Phys. Lett. 72, 173 (1998)APPLAB000072000002000173000001.

    R. Gehrke, Rev. Sci. Instrum. 63, 455 (1992)RSINAK000063000001000455000001.

    R. Gehrke, M. Bark, D. Lewin, and S. Cunis, Rev. Sci. Instrum. 66, 1354 (1995)RSINAK000066000002001354000001.

    Y. J. Suh and S. K. Friedlander, J. Appl. Phys. 93, 3515 (2003)JAPIAU000093000006003515000001.

    A. Hasmy, R. Vacher, and R. Jullien, Phys. Rev. B 50, 1305 (1994).


For access to citing articles, you need to log in.


Figures (14)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)


Close

Google Calendar

ADVERTISEMENT

Your Recent History Recent History Help

Recently Viewed

  1. Strain induced anisotropies in silica polydimethylsiloxane composites
  2. Polymer translocation through pores with complex geometries
  3. Mode-dependent dispersion in Raman line shapes: Observation and implications from ultrafast Raman loss spectroscopy
  4. The axial methionine ligand may control the redox reorganizations in the active site of blue copper proteins
  5. Aggregation of amphiphilic polymers in the presence of adhesive small colloidal particles
Go to AIP Home
Copyright © American Institute of Physics
close