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

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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.

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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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Authors and Affiliations

  1. School of Material Science and Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia

    Dilip Chandra Deb Nath, Sri Bandyopadhyay & Aibing Yu

  2. Research and Ash Development, Cement Australia, Brisbane, QLD, Australia

    Darryl Blackburn & Chris White

  3. Department of Chemical Engineering, IIT Madras, Chennai, 600 036, India

    Susy Varughese

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  1. Dilip Chandra Deb Nath
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  2. Sri Bandyopadhyay
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Correspondence to Sri Bandyopadhyay.

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Nath, D.C.D., Bandyopadhyay, S., Yu, A. et al. Isothermal crystallization kinetics of fly ash filled iso-polypropylene composite- and a new physical approach. J Therm Anal Calorim 99, 423–429 (2010). https://doi.org/10.1007/s10973-009-0408-6

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