New poly(ethylene oxide)-clay composites.
This paper reports a new mechanism for the formation of clay intercalates containing poly(ethylene oxide) (PEO). This mechanism permits formation of a two-dimensional PEO crystal phase. Under acidic conditions, polymer adsorption occurs through an ion-exchange process that is mediated by oxonium cation formation. A single phase exhibiting a plateau in the d{sub 001} reflections of 19 Angstroms is formed at a polymer/clay stoichiometry of 0.5 g/g. This two-dimensional PEO crystal phase has a higher melting temperature than its three-dimensional counterpart because it is confined within the clay galleries. Unlike previously reported methods for forming PEO/clay intercalates, oxonium ion exchange produces structures whose basal spacings increase with increasing polymer molecular weight.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- NE; OUS
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 949624
- Report Number(s):
- ANL/CMT/JA-42644; CMATEX; TRN: US1003600
- Journal Information:
- Chem. Mater., Vol. 15, Issue 5 ; Mar. 11, 2003; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Selective Plasticization of Poly (ethylene oxide) (PEO) Block in Nanostructured Polystyrene– PEO– Polystyrene Triblock Copolymer Electrolytes
Synthesis, structure, and reaction of poly(ethylene oxide)/V{sub 2}O{sub 5} intercalative nanocomposites