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- Title
Cure kinetics of epoxy/MWCNTs nanocomposites: Nonisothermal calorimetric and rheokinetic techniques.
- Authors
Saeb, Mohammad Reza; Rastin, Hadi; Nonahal, Milad; Ghaffari, Mehdi; Jannesari, Ali; Formela, Krzysztof
- Abstract
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. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45221.
- Subjects
MULTIWALLED carbon nanotubes; EPOXY coatings; NANOCOMPOSITE materials; CHEMICAL resistance; DIFFERENTIAL scanning calorimetry
- Publication
Journal of Applied Polymer Science, 2017, Vol 134, Issue 35, pn/a
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.45221