Thermomechanical behavior of poly(vinyl alcohol) and sugar cane bagasse composites

Authors

  • Emo Chiellini,

    Corresponding author
    1. Department of Chemistry and Industrial Chemistry, Universiy of Pisa, Via Risorgimento 35, 56126 Pisa, Italy, INSTM, UdR Pisa
    • Department of Chemistry and Industrial Chemistry, Universiy of Pisa, Via Risorgimento 35, 56126 Pisa, Italy, INSTM, UdR Pisa
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  • Patrizia Cinelli,

    1. Department of Chemistry and Industrial Chemistry, Universiy of Pisa, Via Risorgimento 35, 56126 Pisa, Italy, INSTM, UdR Pisa
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  • Roberto Solaro,

    1. Department of Chemistry and Industrial Chemistry, Universiy of Pisa, Via Risorgimento 35, 56126 Pisa, Italy, INSTM, UdR Pisa
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  • Michele Laus

    1. Department of Science and Advanced Technologies, University of Piemonte Orientale, Corso Borsalino 54, 15100 Alessandria, Italy, INSTM, UdR, Alessandria
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Abstract

Fibers from renewable resources are gaining interest for use as fillers in hybrid composite materials. Particularly waste material such as sugar cane bagasse offer large availability, biodegradability, and low cost. Influence of single components on composite material properties is an important parameter to be evaluated. Composites of poly(vinyl alcohol) (PVA) at 88 and 98% saponification degrees and sugar cane bagasse (B) were prepared by casting water suspensions of the components and characterized for their dynamic mechanical behavior. The storage modulus below and above the glass transition and the shape of the relaxation process are strongly influenced by the amount of B. Good adhesion was observed at the lignocellulosic fiber–synthetic polymer interface. Urea and glycerol are able to plastify the PVA/B composites thus giving rise to a decrease of the glass transition temperature and to a widening of the glass transition temperature gap. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 426–432, 2004

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