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Synthesis and Properties of Biobased Polyurethane/Montmorillonite Nanocomposites
Abstract:Polyurethanes (PURs) are very versatile polymeric materials with a wide range of physical and chemical properties. PURs have desirable properties such as high abrasion resistance, tear strength, shock absorption, flexibility and elasticity. Although they have relatively poor thermal stability, this can be improved by using treated clay. Polyurethane/clay nanocomposites have been synthesized from renewable sources. A polyol for the production of polyurethane by reaction with an isocyanate was obtained by the synthesis of palm oil-based oleic acid with glycerol. Dodecylbenzene sulfonic acid (DBSA) was used as catalyst and emulsifier. The unmodified clay (kunipia-F) was treated with cetyltrimethyl ammonium bromide (CTAB-mont) and octadodecylamine (ODAmont). The d-spacing in CTAB-mont and ODA-mont were 1.571 nm and 1.798 nm respectively and larger than that of the pure-mont (1.142 nm). The organoclay was completely intercalated in the polyurethane, as confirmed by a wide angle x-ray diffraction (WAXD) pattern. The results showed that adding clay demonstrated better thermal stability in comparison with the virgin polyurethane. Onset degradation of pure PU is at 200oC, and is lower than that of the CTAB-mont PU and ODA-mont PU which takes place at about 318oC and 330oC, respectively. The mechanical properties (including the dynamic mechanical properties) of pure polyurethane (PU) and PU/clay nanocomposites, were measured. The modified organoclay had a remarkably beneficial effect on the strength and elongation at break of the nanocomposites, which both increased with increasing clay content with the increase of the tensile strength of more than 214% and 267% by the addition of only 5 wt% of the montmorillonite CTAB-mont PU and ODA-mont PU, respectively.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1062534Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2442
 Rihayat, T., Saari, M., Mahmood, M.H., Wan Yunus, W.M.Z., Suraya, A.R., Dahlan, K. Z. H. M. and Sapuan, S.M.. 2006. Synthesis and thermal characterization of Polyurethane/ clay nanocomposites based on palm oil polyol. Polymer Plastics Technology and Engineering 45 : 1323-1326
 Warwel, S., Bruse, F., Demes, C., Kunz, M, and Klaas, M.R. 2001. Polymers and surfactants on the basis of renewable resources. Chemosphere 43: 39-48
 Guo, A., Demydov, D., Zhang, W. and Petrovic, Z.S. 2002. Polyols and Polyurethanes from Hydroformylation of Soybean Oil, Journal of Polymers and the Environment 10: 49-52
 Beuer, B., Gruetzmacher, R., Heidbreder, A. and Klein, J. 2000. Polyurethane resins. US Patent no. 6,046,298.
 Bierman, U., Friedt, W., Lang, S., Luhs, W., Machmuller, G., Metzger, J.O., Klass, M.R., Schafer, H.J., and Scheiner, M.P. 2000. New synthesis with oils and fats as renewable raw materials for the chemical industry. Angew.Chem.Int.ed. 39 : 2206 - 2224.
 Nakamura, K., Nishimura, Y., Zetterlund, P., Hatakeyama, T. and Hatakeyama, H. 1996. TG-FTIR studies on biodegradable polyurethanes containing mono-and disaccharide components. Thermochimica acta 282/283 : 433-441.
 Petrovic, Z.S and Ferguson, J. 1991. Polyurethane elastomers. Prog.Polym.Sci.16 : 695-836.
 Zapletalova, T., Michielsen, S. and Pourcheyhimi, B. 2006. Polyether based thermoplastic polyurethane melt blown nonwovens. Journal of Engineered Fibers and Fabrics 1 : 62-72.
 Alexandre, M and Dubois, P. 2000. Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materials. Materials Science and Engineering: R: Reports 28: 1-63
 Eychenne, V. and Mouloungui, Z. 1999. High concentration of 1-(3- )monoglycerides by direct partial esterification of fatty acids with glycerol. Fett/Lipid 101 : 424-427
 Chen, T.K., Tien, Y.I. and Wei, K.H. 2000. Synthesis and characterization of novel segmented polyurethane/clay nanocomposites. Polymer 41: 1345-1353
 Chun, B.C., Cho, T.K., Chung, Y.C. 2006. Enhanced mechanical and shape memory properties of polyurethane block copolymers chainextended by ethylene diamines. European Polymer Journal 42 : 3367- 3373
 Rihayat, T., Saari, M., Hilmi Mahmood, M., Wan Yunus, W.M.Z., Suraya, A.R., Dahlan, K,Z.H.M. and Sapuan, S.M. 2007. Mechanical Characterisation of Polyurethane/Clay Nanocomposites. Polymers & Polymer Composites 15: 597-602
 Abdalla, M.O., Dean, D. and Campbell, S. 2002. Viscoelastic and mechanical properties of thermoset PMR-type polyimide-clay nanocomposites. Polymer 43: 5887
 Choi, W.J., Kim, S.H., Kim, Y.J. and Kim, S.C. 2004. Synthesis of chain-extended organifier and properties of polyurethane/clay nanocomposites. Polymer 45: 6045-6057
 Agag, T., Koga, T. and Takeichi, T. 2001. Studies on thermal and mechanical properties of polyimide-clay nanocomposites. Polymer 42: 3399-3408.