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標題: Novel mechanism for layered silicate clay intercalation by poly(propylene oxide)-segmented carboxylic acid
作者: Lin, J.J.
Chang, Y.C.
Cheng, I.J.
關鍵字: amidoacid;clay;intercalation;poly(propylene oxide);X-ray;nanocomposite materials;poly(ethylene oxide);amino-acids;montmorillonite;hybrids;epoxy
Project: Macromolecular Rapid Communications
期刊/報告no:: Macromolecular Rapid Communications, Volume 25, Issue 3, Page(s) 508-512.
Poly(propylene oxide)-amidoacids were used to intercalate montmorillonite clay to afford organoclays with an X-ray basal spacing as wide as 81 Angstrom. Differing from the ionic exchange between quaternary ammonium salts and the metal ions in clays, the intercalation mechanism involves a beta-amidoacid chelation with sodium ions in the silicate interlayer confinement. With the end groups tethered on the silicate surface, the hydrophobic polypropylene oxide)backbones self-aggregate and consequently widen the interlayer space between neighboring silicate plates.
ISSN: 1022-1336
DOI: 10.1002/marc.200300076
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