Journal of Thermal Analysis and Calorimetry

, Volume 99, Issue 2, pp 423–429 | Cite as

Isothermal crystallization kinetics of fly ash filled iso-polypropylene composite- and a new physical approach

  • Dilip Chandra Deb Nath
  • Sri Bandyopadhyay
  • Aibing Yu
  • Darryl Blackburn
  • Chris White
  • Susy Varughese
Article
First Online:
Received:
Accepted:

Abstract

Composites of pre-mixed fly ash (FA) and isotactic-polypropylene (PP) with varying degree of FA, 0, 20, 45 and 60 wt% were prepared by injection moulding at 483 K. The isothermal crystallization kinetics of the neat PP and composites are calculated using exotherms obtained from differential scanning calorimetry (DSC) at different isothermal crystallization temperatures (T c) 403, 405 and 407 K. The lowest points of the exotherm peaks were shifted to higher crystallization times in the ranges of 0.75–1.50 min with the increasing of T c in neat PP and composites regardless of FA percentage addition. The values of Avrami exponent n are found as non-integral number ranges 2 < n < 4, and the calculated initial crystal thickness values of PP change slightly with increasing super cooling temperature as well as FA content.

Keywords

Polypropylene Fly ash Composites Isothermal crystallization DSC 
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Notes

Acknowledgements

Dilip Chandra Deb Nath is grateful to ARC (Australian Research Council) for full financial support in the linkage program study (Project: ARC LP0669837).

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • Dilip Chandra Deb Nath
    • 1
  • Sri Bandyopadhyay
    • 1
  • Aibing Yu
    • 1
  • Darryl Blackburn
    • 2
  • Chris White
    • 2
  • Susy Varughese
    • 3
  1. 1.School of Material Science and EngineeringThe University of New South WalesSydneyAustralia
  2. 2.Research and Ash DevelopmentCement AustraliaBrisbaneAustralia
  3. 3.Department of Chemical EngineeringIIT MadrasChennaiIndia

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