Journal
THERMOCHIMICA ACTA
Volume 549, Issue -, Pages 63-68Publisher
ELSEVIER
DOI: 10.1016/j.tca.2012.09.015
Keywords
Cure kinetics; Epoxy resins; Differential scanning calorimetry; Sodium carboxymethyl cellulose
Funding
- National Natural Science Foundation of China [20976032, 21076049]
- Fundamental Research Funds for the Central Universities [HEUCFZ1018, HEUCFT1009]
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Sodium carboxymethyl cellulose (CMC) have been used to disperse carbon nanotubes (CNTs) and have potential applications to make the CNTs/epoxy or CNTs/epoxy/carbon fiber composites. In this paper, the curing kinetics of epoxy resins with and without CMC and cured with 4,4'-diamino diphenyl methane (DDM) hardener was studied by non-isothermal differential scanning calorimetry (DSC). A two-parameter (m, n) autocatalytic model was used to describe the cure kinetics of the epoxy resins. The kinetic parameters were calculated with the Malek method and least square regression (LSR) method, respectively. The curves by Malek method and LSR method both show a good agreement with the experimental data for Epoxy/DDM and CMC/epoxy/DDM systems. The results, based on the two methods, showed that the activation energy was no obvious difference with the addition of CMC, which indicated that the CMC have no effect on the curing reaction without changing the kinetic model. (C) 2012 Elsevier B.V. All rights reserved.
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