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Cure kinetics of epoxy/MWCNTs nanocomposites: Nonisothermal calorimetric and rheokinetic techniques

Abstract

Nonisothermal calorimetric and isothermal rheokinetic analyses were used to study cure kinetics of epoxy/anhydride systems containing very low concentration of pristine and amine-functionalized multiwalled carbon nanotubes (MWCNTs). Isoconversional methods were applied in calorimetric modeling of cure kinetics. Eα vs. α dependency and autocatalytic nature of curing were identified for both types of nanocomposites by isoconversional models. Fall in Eα value from 90 to 82.5 kJ mol−1 thanks to amine functionalization (with Eα of blank epoxy/anhydride of 80.3 kJ mol−1) was indicative of high potential of nanocomposites to cure at low concentration of functionalized MWCNTs (0.1 g with respect to 100 g of resin). Times of gelation and vitrification of epoxy were measured using storage and loss modulus data provided by isothermal rheokinetic analysis, showing a drop upon attachment of amine groups to MWCNTs. In complete agreement with nonisothermal calorimetric studies, variation of storage and loss modulus of nanocomposites confirmed hindered/accelerated cure devoted to pristine/amine-functionalized MWCNTs.

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Authors (6)

  • Photo of  Mohammad Saeb

    Mohammad Saeb

    • Institute for Color Science and Technology, Tehran, Iran Department of Resin and Additives
  • Photo of  Hadi Rastin

    Hadi Rastin

    • University of Tehran, Tehran, Iran School of Chemical Engineering, College of Engineering
  • Photo of  Milad Nonahal

    Milad Nonahal

    • University of Tehran, Tehran, Iran School of Chemical Engineering, College of Engineering
  • Photo of  Mehdi Ghaffari

    Mehdi Ghaffari

    • Golestan University, Gorgan, Golestan, Iran Department of Polymer
  • Photo of  Ali Jannesari

    Ali Jannesari

    • Institute for Color Science and Technology, Tehran, Iran Department of Resin and Additives

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Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
JOURNAL OF APPLIED POLYMER SCIENCE no. 134, edition 35, pages 1 - 10,
ISSN: 0021-8995
Language:
English
Publication year:
2017
Bibliographic description:
Saeb M., Rastin H., Nonahal M., Ghaffari M., Jannesari A., Formela K.: Cure kinetics of epoxy/MWCNTs nanocomposites: Nonisothermal calorimetric and rheokinetic techniques// JOURNAL OF APPLIED POLYMER SCIENCE. -Vol. 134, iss. 35 (2017), s.1-10
DOI:
Digital Object Identifier (open in new tab) 10.1002/app.45221
Verified by:
Gdańsk University of Technology

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