Clay-polymer nanocomposites: Polyether and polyimide systems
- Michigan State Univ., East Lansing, MI (United States)
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 10{angstrom}-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 CO{sub 2} barrier properties.
- OSTI ID:
- 51547
- Report Number(s):
- CONF-940411--; ISBN 1-55899-246-4
- Country of Publication:
- United States
- Language:
- English
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