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Received September 27, 2010
Accepted January 3, 2011
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Thermomechanical properties of ethylene-propylene-diene terpolymer/organoclay nanocomposites and foam processing in supercritical carbon dioxide
Department of Chemical Engineering, Hanyang University, Ansan 425-791, Korea
Korean Journal of Chemical Engineering, August 2011, 28(8), 1779-1784(6), 10.1007/s11814-011-0002-z
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Abstract
EPDM/organoclay nanocomposites were prepared by a melt mixing of a semicrystalline EPDM grafted with maleic anhydride and an organoclay (Cloisite 20A) in an internal mixer. XRD and TEM analysis revealed that the EPDM/clay forms a partially exfoliated nanocomposite and the silicate layers of the clay are uniformly dispersed at a nanometer scale in the rubber matrix. DSC studies indicated that the clay nanoparticles caused an increase in the nonisothermal crystallization temperature of the EPDM. Tensile and dynamic mechanical analysis showed that a small amount of the clay nanoparticles effectively enhanced the stiffness of the EPDM without adversely affecting its flexibility. The EPDM/clay nanocomposites were used to produce foams by using a batch process in an autoclave, with supercritical carbon dioxide as a foaming agent. The exfoliated nanocomposite produced a microcellular foam with average cell size as small as 6.23 μm and cell density as high as 2.4×1010 cell/cm3.
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References
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Wang KH, Choi MH, Koo CM, Choi YS, Chung IJ, Polymer, 42(24), 9819 (2001)
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Taki K, Yanagimoto T, Funami E, Okamoto M, Ohshima M, Polym. Eng. Sci., 44(6), 1004 (2004)
Mitsunaga M, Ito Y, Ray SS, Okamoto M, Hironaka K, Macromol. Mater. Eng., 288, 543 (2003)
Ito Y, Yamashita M, Okamoto M, Macromol. Mater. Eng., 291, 773 (2006)
Fujimoto Y, Ray SS, Okamoto M, Ogami A, Yamada K, Ueda K, Macromol. Rapid Commun., 24(7), 457 (2003)
Di YW, Iannace S, Di Maio E, Nicolais L, J. Polym. Sci. B: Polym. Phys., 43(6), 689 (2005)
Han XM, Zeng CC, Lee LJ, Koelling KW, Tomasko DL, Polym. Eng. Sci., 43(6), 1261 (2003)
Strauss W, D’Souza NA, J. Cell. Plast., 40, 229 (2004)
Zeng CC, Han XM, Lee LJ, Koelling KW, Tomasko DL, Adv. Mater., 15(20), 1743 (2003)
Chang YW, Lee DS, Bae SY, Polym. Int., 55, 184 (2006)
Vaia RA, Giannelis EP, Macromolecules, 30(25), 8000 (1997)
Priya L, Jog JP, J. Polym. Sci. B: Polym. Phys., 41(1), 31 (2003)
Wang Z, Pinnavaia TJ, Chem. Mater., 10, 3769 (1998)
Xu R, Manias E, Snyder AJ, Runt J, J. Biomed. Mater. Res., 64A, 114 (2003)
Amornsakchai T, Sinpatanapan B, Bualek-Limcharoen S, Meesiri W, Polymer, 40(11), 2993 (1999)
