Please use this identifier to cite or link to this item: https://doi.org/10.1166/jnn.2005.171
Title: Effect of heterocyclic based organoclays on the properties of polyimide - Clay nanocomposites
Authors: Krishnan, P.S.G.
Joshi, M.
Bhargava, P.
Valiyaveettil, S. 
He, C.
Keywords: Heterocyclic Compounds
Kunipia F
Montmorillonite
Nanocomposite
Organoclay
Polyimide
Properties
Issue Date: 2005
Citation: Krishnan, P.S.G., Joshi, M., Bhargava, P., Valiyaveettil, S., He, C. (2005). Effect of heterocyclic based organoclays on the properties of polyimide - Clay nanocomposites. Journal of Nanoscience and Nanotechnology 5 (7) : 1148-1157. ScholarBank@NUS Repository. https://doi.org/10.1166/jnn.2005.171
Abstract: Polyimide-clay nanocomposites were prepared from their precursor, namely, polyamic acid, by the solution-casting method. Organomodified montmorillonite (MMT) clay was prepared by treating Na +MMT (Kunipia F) with three different intercalating agents, namely, piperazine dihydrochloride, 1,3-bis(4-piperidinylpropane) dihydrochloride and 4,4′-bipiperidine dihydrochloride at 80°C. Polyamic acid solutions containing various weight percentages of organomodified MMT were prepared by reacting 4,4′-(1, 1′-biphenyl-4,4′-diyldioxy)dianiline with bicyclo[2.2.2]oct-7-ene-2, 3,5,6-tetracarboxylic dianhydride in N-methyl-2-pyrrolidinone containing dispersed particles of organomodified MMT at 20°C. Nanocomposite films were prepared from these solutions by solution casting and heated subsequently at a programmed heating rate. These films were transparent and brown in color. The extent of layer separation in nanocomposite films depends upon the chemical structure of the organoclay. These films were characterized by inherent viscosity, FT-IR, DSC, TMA, WAXD, TEM, UV, and TGA. The tensile behavior and surface energy studies were also investigated. The nanocomposite films had superior tensile properties, thermal behavior, and solvent resistance. Among the three organoclays, piperazine dihydrochloride was the best modifier. Copyright © 2005 American Scientific Publishers All rights reserved.
Source Title: Journal of Nanoscience and Nanotechnology
URI: http://scholarbank.nus.edu.sg/handle/10635/93646
ISSN: 15334880
DOI: 10.1166/jnn.2005.171
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