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Cure Kinetics of Nanodiamond-Filled Epoxy Resin: Influence of Nanodiamond Surface Functionality

Aris, A ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1021/acs.iecr.5b01858
  3. Publisher: American Chemical Society , 2015
  4. Abstract:
  5. Thermally oxidized nanodiamond (OND), amine-functionalized ND (AND) and untreated ND (UND) were added to epoxy/TETA at 1 wt % loading. The ND enhanced the dynamic storage modulus of epoxy while decreasing the glass transition temperature because of the increment of free volume in the vicinity of the ND surfaces. The ND induced an acceleration effect on the curing reaction which could be due to functional groups of the ND and lack of any steric hindrance on molecules by the ND particles themselves. The Vyazovkin model-free isoconversional method indicated that all NDs decreased the activation energy; among them, AND showed the lowest value because of the significant promotion of the epoxide ring-opening reaction by polar amino groups. The Sestak-Berggren kinetics model was used to predict successfully the cure kinetics of epoxy/ND
  6. Keywords:
  7. Activation energy ; Curing ; Epoxy resins ; Glass transition ; Kinetics ; Acceleration effects ; Epoxide ring-opening reaction ; Filled epoxy resins ; Kinetics modeling ; Model-free isoconversional method ; Steric hindrances ; Surface functionalities ; Thermally oxidized ; Nanodiamonds
  8. Source: Industrial and Engineering Chemistry Research ; Volume 54, Issue 36 , August , 2015 , Pages 8954-8962 ; 08885885 (ISSN)
  9. URL: http://pubs.acs.org/doi/10.1021/acs.iecr.5b01858