Synthesis, characterization, and performance evaluation of hard, anticorrosive coating materials derived from diglycidyl ether of bisphenol A acrylates and methacrylates

Authors

  • Sharif Ahmad,

    Corresponding author
    1. Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110 025, India
    • Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110 025, India
    Search for more papers by this author
  • S. M. Ashraf,

    1. Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110 025, India
    Search for more papers by this author
  • S. N. Hassan,

    1. Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110 025, India
    Search for more papers by this author
  • Abul Hasnat

    1. Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110 025, India
    Current affiliation:
    1. Department of Chemistry, Gandhi Faizam College (Mahatama Jyotiba Phule Rohilkhand University), Shahjahanpur, Utter Pradesh, India
    Search for more papers by this author

Abstract

Diglycidyl ether of bisphenol A acrylate (DAC) and diglycidyl ether of bisphenol A methacrylate (DMAC) were synthesized by the reaction of an epoxy [diglycidyl ether of bisphenol A (DGEBA)] with acrylic acid and methacrylic acid, respectively. The synthesized resins were characterized by determination of the acid, hydroxyl, and saponification values. Structure elucidation was done by gel permeation chromatography, Fourier transform infrared spectroscopy, 1H-NMR spectroscopy, and 13C-NMR spectroscopy. DACs were cured with melamine formaldehyde resin at low pH values. The pH of the resin systems was adjusted with phosphoric acid. The coatings of these systems were formed on mild steel specimens for physicomechanical and chemical/corrosion-resistance performance. The coatings of DAC and DMAC showed excellent scratch hardness and good impact-resistance performance. The coatings of DMAC showed better performance than DAC with respect to chemical and corrosion resistance. Thermogravimetric analysis and differential scanning calorimetry were used to investigate the thermal stability and curing behavior of these systems. DAC showed a little higher glass-transition temperature than DMAC and also showed a higher thermal resistivity. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 494–501, 2005

Ancillary