Comparison of in-situ polymerization and Solution-Dispersion Techniques in the preparation of polyimide/montmorillonite (MMT) nanocomposites
Ahmad @ Ayob, Mansor and Gharayebi, Yadollah and Salit, Mohd Sapuan and Hussein, Mohd Zobir and Shameli, Kamyar (2011) Comparison of in-situ polymerization and Solution-Dispersion Techniques in the preparation of polyimide/montmorillonite (MMT) nanocomposites. International Journal of Molecular Sciences, 12 (9). pp. 6040-6050. ISSN 1422-0067
Official URL: http://www.mdpi.com/1422-0067/12/9/6040
In this paper, Polyimide/Montmorillonite Nanocomposites (PI/MMT NCs), based on aromatic diamine (4-Aminophenyl sulfone) (APS) and aromatic dianhydride (3,3',4,4'-benzophenonetetracarboxylic dianhydride) (BTDA) were prepared using in situ polymerization and solution-dispersion techniques. The prepared PI/MMT NCs films were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The XRD results showed that at the content of 1.0 wt % Organo Montmorillonite (OMMT) for two techniques and 3.0 wt % OMMT for the in situ polymerization technique, the OMMT was well-intercalated, exfoliated and dispersed into polyimide matrix. The OMMT agglomerated when its amount exceeded 10 wt % and 3.0 wt % for solution-dispersion and in situ polymerization techniques respectively. These results were confirmed by the TEM images of the prepared PI/MMT NCs. The TGA thermograms indicated that thermal stability of prepared PI/MMT NCs were increased with the increase of loading that, the effect is higher for the samples prepared by in situ polymerization technique.
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