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Synthesis and characterization of bio-based polyurethane from benzoylated cashewnut husk tannins
A J Sunija S Siva Ilango K P Vinod Kumar
Volume 37 Issue 3 May 2014 pp 735-741
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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
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Author Affiliations
A J Sunija1 S Siva Ilango2 K P Vinod Kumar1
- Department of Chemistry, University College of Engineering Nagercoil, Anna University, Nagercoil 629 004, India
- Department of Chemistry, Thiagaraja College of Engineering, Madurai 625 015, India
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Dates
- Published
- May 2014
- Manuscript received
- 27 February 2013
- Manuscript revised
- 19 April 2013
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Bulletin of Materials Science
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