Skip to main content
SpringerLink
Log in

Comparative rheological studies of polyamide-6 and its low loaded nanocomposite based on layered silicates

  • Original Contribution
  • Published:
Rheologica Acta Aims and scope Submit manuscript

Abstract

We study some rheological properties for polyamide-6 (PA-6) and a low concentrated clay nanocomposite melt based on polyamide-6 and montmorillonite. Simple shear experiments, carried out for both the neat system and nanocomposite at two different temperatures, include start up shear flows, stress relaxation after cessation of steady flow and oscillatory shear. The dynamic data for the neat PA-6 matrix differ markedly from that of the nanocomposite system, even if it has very low nanofiller concentration. Thermal stability of the PA-6 matrix imposed many restrictions on rheological studies of our systems. Therefore an experimental window was established via rheological and thermal characterization of the materials, wherein the polymer matrix was confirmed to be thermally stable. The relaxation spectra for both polymer systems were determined from linear dynamic experiments using the Pade’-Laplace procedure. A rough estimation of nanocomposite volume fraction at percolation allowed us to attribute the occurrence of extra (relative to the neat polymer) Maxwell modes observed for the nanocomposite to the formation of a particulate network above the percolation threshold.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4a,b
Fig. 5a,b
Fig. 6
Fig. 7
Fig. 8a,b
Fig. 9

Similar content being viewed by others

References

  • Agarwal S, Salovey R (1995) Model filled polymers. XV. The effects of chemical interactions and matrix molecular weight on rheology Polym Eng Sci 35:1241

    CAS  Google Scholar 

  • Alexandre M, Dubois P (2000) Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materials. Mater Sci Eng 28:1–63

    Article  Google Scholar 

  • Coussot P, Leonov AI, Piau JM (1993) Rheology of concentrated dispersed systems in a low molecular weight matrix. J Non-Newtonian Fluid Mech 46:179–217

    Google Scholar 

  • Coussot P, Nguyen QD, Huynh HT, Bonn D (2002) Viscosity bifurcation in thixotropic, yielding fluids. J Rheol 46:573–589

    Article  CAS  Google Scholar 

  • Fulchiron R, Verney V, Cassagnau P, Michel A (1993) Deconvolution of polymer melt stress relaxation by the Pade’-Laplace method. J Rheol 37:17–34

    Article  CAS  Google Scholar 

  • Garcés JM, Moll DJ, Bicerano J, Fibiger R, McLeod DG (2000) Polymeric nanocomposites for automotive applications.Adv Mater 12:1835–1839

    Article  CAS  Google Scholar 

  • Giannelis EP, Krishnamoorti R, Manias E (1999) Polymer-silicate nanocomposites: model systems for confined polymers and polymer brushes. Adv Polym Sci 138:107–147

    CAS  Google Scholar 

  • Krishnamoorti R, Giannelis EP (1997) Rheology of end-tethered polymer layered silicate nanocomposites. Macromolecules 30:4097–4102

    Article  CAS  Google Scholar 

  • Krishnamoorti R, Vaia RA, Giannelis EP (1996) Structure and dynamics of polymer-layered silicate nanocomposites. Chem Mater 8:1728–1734

    Article  CAS  Google Scholar 

  • Larson RG, Winey KI, Patel SS, Watanabe H, Bruinsma R (1993) The rheology of layered liquids: lamellar block copolymers and smectic liquid crystals. Rheol Acta 32:245

    CAS  Google Scholar 

  • Leonov AI (1990) On the rheology of filled polymers. J Rheol 34:1039–1068

    Article  Google Scholar 

  • Liu L, Qi Z, Zhu X (1999) Studies on Nylon-6/clay nanocomposites by melt-intercalation process. J Appl Polym Sci 71:1133–1138

    Article  CAS  Google Scholar 

  • Orbey N, Dealy J (1991) Determination of the relaxation spectrum from oscillatory shear data. J Rheol 35:1035–1049

    Article  CAS  Google Scholar 

  • Ren J, Silva AS, Krishnamoorti R (2000) Linear viscoelasticity of disordered polystyrene-polyisoprene block copolymer based layered silicate nanocomposites. Macromolecules 33:3739–3746

    Article  CAS  Google Scholar 

  • Simhambhatla M, Leonov AI (1993) The extended Pade’-Laplace method for efficient discretization of linear viscoelastic spectra. Rheol Acta 32:589–600

    CAS  Google Scholar 

  • Vaia RA (2000) In: Pinnavaia TJ, Beall GW (eds) Polymer-clay nanocomposites. Wiley, New York, chap 12

  • Vinogradov GV, Malkin AY, Plotnikova EP, Sabsai OY, Nikolayeva NE (1972) Viscoelastic properties of filled polymers. Int J Polym Mater 2:1–27

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Polymer Engineering, University of Akron, Akron, OH, 44325, USA

    Ravishankar K. Ayyer & Arkady I. Leonov

Authors
  1. Ravishankar K. Ayyer
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Arkady I. Leonov
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Arkady I. Leonov.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ayyer, R.K., Leonov, A.I. Comparative rheological studies of polyamide-6 and its low loaded nanocomposite based on layered silicates. Rheol Acta 43, 283–292 (2004). https://doi.org/10.1007/s00397-003-0343-6

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00397-003-0343-6

Keywords

Search

Navigation