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      https://www.ias.ac.in/article/fulltext/boms/037/03/0735-0741

    • Keywords

       

      Cashewnut husk; benzoylated tannin; polyurethane.

    • Abstract

       

      Benzoylated tannin prepared by benzoylation of cashewnut husk tannin, was treated with hexame-thylenediisocyanate in the presence of 1,4-butanediol as an extender to prepare thermosetting polyurethane. The sample was characterized using FT–IR and 13C NMR spectra. Thermal, morphological, physico-chemical and electrical properties were also investigated. Polyurethane obtained was sensitive to moisture but had very good solvent resistance. Results show that 𝑇g of the sample is 260 °C and thermal decomposition begins at 280 °C. The dielectric constant varies randomly with temperature. The conductivity of the sample was found to increase with increase in temperature but shows random variation at 90 and 150 °C

    • Author Affiliations

       

      A J Sunija1 S Siva Ilango2 K P Vinod Kumar1

      1. Department of Chemistry, University College of Engineering Nagercoil, Anna University, Nagercoil 629 004, India
      2. Department of Chemistry, Thiagaraja College of Engineering, Madurai 625 015, India
    • Dates

       
  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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