Abstract
A new type of clay-polyether nanocomposite has been prepared by the self-polymerization of diglycidyl ether of bisphenol A in the galleries of acidic alkylammonium ion exchanged forms of montmorillonite. The acid catalyzed intragallery polymerization process leads to the spontaneous exfoliation to the 10Å-thick clay layers. Intra- and extragallery polymerization processes are distinguishable by DSC.
Clay-polyimide hybrid composites have also been prepared by the intercalation of polyamic acid in montmorillonites and subsequent thermal conversion to polyimide. In contrast to the completely exfoliated clay-polyether system, the polyimide system contain regularly intercalated clay aggregates in the polymer matrix. Although regular face-face clay layer aggregation is extensive, the clay-polyimide hybrid composite films exhibit greatly improved CO2 barrier properties.
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Pinnavaia, T.J., Lan, T., Kaviratna, P.D. et al. Clay-Polymer Nanocomposites: Polyether and Polyimide Systems. MRS Online Proceedings Library 346, 81–88 (1994). https://doi.org/10.1557/PROC-346-81
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DOI: https://doi.org/10.1557/PROC-346-81