Study on the effect of hexamethylene diamine functionalized graphene oxide on the curing kinetics of epoxy nanocomposites

[Display omitted] •Non-isothermal DSC was used to study the curing kinetics of the epoxy nanocomposite.•Peak temperature (TP) of epoxy curing reaction increases on loading P-GO or A-GO.•Kinetic analysis of these epoxy nanocomposites revealed the autocatalytic nature.•Model equations for non-isotherm...

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Bibliographic Details
Published in:European polymer journal 2014-03, Vol.52, p.88-97
Main Authors: Ryu, Sung Hun, Sin, J.H., Shanmugharaj, A.M.
Format: Article
Language:English
Subjects:
Applied sciences
Autocatalytic reactions
Composites
Curing kinetics
Epoxy nanocomposites
Exact sciences and technology
Forms of application and semi-finished materials
Graphene oxide
Hexamethylene diamine
Non-isothermal differential scanning calorimetry
Polymer industry, paints, wood
Technology of polymers
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Summary:[Display omitted] •Non-isothermal DSC was used to study the curing kinetics of the epoxy nanocomposite.•Peak temperature (TP) of epoxy curing reaction increases on loading P-GO or A-GO.•Kinetic analysis of these epoxy nanocomposites revealed the autocatalytic nature.•Model equations for non-isothermal curing kinetics of epoxy system were derived. The curing kinetics of epoxy nanocomposites prepared by incorporating pristine graphene oxide (GO) and hexamethylene diamine functionalized graphene oxide (AGO) was studied using non-isothermal differential scanning calorimetry (DSC) experiments. Loading of AGO in epoxy matrix resulted in the decrease of peak exotherm temperature (TP) at all heating rates corroborating the enhanced curing reactions, when compared to the pristine GO filled epoxy system. The kinetic parameters of the curing processes of the neat, pristine and functionalized GO filled epoxy were determined using isoconversional methods viz. Kissinger and Friedman methods. In comparison to pristine GO filled epoxy system, epoxy nanocomposites loaded with AGO showed lower activation energy (Eα) over the range of conversion (α) revealing the enhanced curing reactions in these system. The predicted curves determined using the kinetic parameters fit well with the non-isothermal DSC thermograms revealing the proposed kinetic equation clearly explain the curing kinetics of the prepared epoxy nanocomposites.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2013.12.014