Cure kinetics of carbon nanotube/tetrafunctional epoxy nanocomposites by isothermal differential scanning calorimetry

Authors

  • Hongfeng Xie,

    1. Key Laboratory for Mesoscopic Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093, China
    Search for more papers by this author
  • Binghua Liu,

    1. Key Laboratory for Mesoscopic Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093, China
    Search for more papers by this author
  • Zuanru Yuan,

    1. Modern Analysis Center, Nanjing University, Nanjing 210093, China
    Search for more papers by this author
  • Jianyi Shen,

    1. Key Laboratory for Mesoscopic Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093, China
    Search for more papers by this author
  • Rongshi Cheng

    Corresponding author
    1. Key Laboratory for Mesoscopic Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093, China
    2. College of Material Science and Engineering, South China University of Technology, Guangzhou 510641, China
    • Key Laboratory for Mesoscopic Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093, China
    Search for more papers by this author

Abstract

The cure kinetics of tetraglycidyl-4,4′-diaminodiphenylmethane (TGDDM) and 4,4′-diaminodiphenylsulfone (DDS) as a cure agent in nanocomposites with multiwalled carbon nanotubes (MWNTs) have been studied with an isothermal differential scanning calorimetry (DSC) technique. The experimental data for both the neat TGDDM/DDS system and for epoxy/MWNTs nanocomposites showed an autocatalytic behavior. Kinetic analysis was performed with the phenomenological model of Kamal and a diffusion control function was introduced to describe the cure reaction in the later stage. Activation energies and kinetic parameters were determined by fitting experimental data. For MWNTs/epoxy nanocomposites, the initial reaction rates increased and the time to the maximum rate decreased with increasing MWNTs contents because of the acceleration effect of MWNTs. The values of the activation energies for the epoxy/MWNTs nanocomposites were lower than the values for the neat epoxy in the initial stage of the reaction. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 3701–3712, 2004

Ancillary