Mechanical and dynamic mechanical studies of epoxy/VAc-EHA/HMMM IPN–jute composite systems

Authors

  • Chandan Datta,

    1. Department of Polymer Science & Technology, 92 A.P.C. Road, University of Calcutta, Calcutta 700 009, India
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  • Diya Basu,

    1. Department of Polymer Science & Technology, 92 A.P.C. Road, University of Calcutta, Calcutta 700 009, India
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  • Abhishek Roy,

    1. Department of Polymer Science & Technology, 92 A.P.C. Road, University of Calcutta, Calcutta 700 009, India
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  • Amarnath Banerjee

    Corresponding author
    1. Department of Polymer Science & Technology, 92 A.P.C. Road, University of Calcutta, Calcutta 700 009, India
    • Department of Polymer Science & Technology, 92 A.P.C. Road, University of Calcutta, Calcutta 700 009, India
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Abstract

Epoxy [50:50 mixture of Di-Glycidyl Ether of Bis-Phenol A (DGEBA) and Epoxidized Novolac (EPN)] was solution blended with Vinyl Acetate-2- Ethylhexylacrylate (VAc-EHA) resin in aqueous medium, in varying weight fractions, with Hexamethoxymethylmelamine (HMMM) as a crosslinker and data was compared with a control. The present work was aimed to optimize the tensile strength, dynamic mechanical strength, impact strength, and toughness by preparing a blend followed by jute composites of a semi- and full interpenetrating network (IPN). In control experiments epoxy alone was crosslinked (semi-IPN), whereas the DGEBA-EPN and VAc-EHA/HMMM were crosslinked separately (full-IPN), using jute as the substrate for making composites. Composites of full-IPN systems of epoxy/VAc-EHA system had higher moduli and UTS than the semi-IPN systems. Dynamic mechanical study showed that full-IPN systems have higher Tg values than semi-IPN systems. The impact strength increases with increasing proportions of VAc-EHA copolymer. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 958–963, 2004

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