Article

Network Formation in PP/Layered Silicate Nanocomposites: Modeling and Analysis of Rheological Properties

  1. János Kovács1,2,
  2. Zita Dominkovics1,2,*,
  3. György Vörös1,3,
  4. Béla Pukánszky1,2

Article first published online: 11 JUL 2008

DOI: 10.1002/masy.200850708

Issue

Macromolecular Symposia

Macromolecular Symposia

Special Issue: Nanostructured Polymers and Polymer Nanocomposites

Volume 267, Issue 1, pages 47–51, June 2008

Additional Information

How to Cite

Kovács, J., Dominkovics, Z., Vörös, G. and Pukánszky, B. (2008), Network Formation in PP/Layered Silicate Nanocomposites: Modeling and Analysis of Rheological Properties. Macromol. Symp., 267: 47–51. doi: 10.1002/masy.200850708

Author Information

  1. 1

    Laboratory of Plastics and Rubber Technology, Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary Fax: 0036-1-463-3474;

  2. 2

    Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 17, Hungary

  3. 3

    Department of General Physics, Eötvös University Budapest, H-1518 Budapest, P.O. Box 32, Hungary

*Laboratory of Plastics and Rubber Technology, Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary Fax: 0036-1-463-3474;.

Publication History

  1. Issue published online: 11 JUL 2008
  2. Article first published online: 11 JUL 2008

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Keywords:

  • layered silicates;
  • PP;
  • rheology;
  • silicate network;
  • structure

Abstract

PP/organophilic montmorillonite composites were prepared from PP homopolymer, maleinated polypropylene and a clay organophilized with octadecyl amine. Various approaches were used to analyze the rheological properties of the composites. Cole-Cole plots proved to be useful, since they detect the network very sensitively. The frequency dependence of the real part of complex viscosity was described with a series of Maxwel bodies coupled parallel to each other. The relaxation time of the melt changed in the range of 0.0005 and 200 sec. Under certain conditions long relaxation times appear in the spectrum, which indicate the formation of new structural units, probably a silicate network. A certain number of silicate layers are needed to create a house-of-cards structure. A threshold concentration of MAPP exists for network formation, which depends on silicate content.

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