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Effect of Ionic Species on the Structures and Properties of Salt‐Containing PEO/Montmorillonite Nanocomposites
Author(s) -
Stefanescu Eduard A.,
Stefanescu Cristina,
Negulescu Ioan I.,
Daly William H.
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800371
Subject(s) - montmorillonite , crystallinity , nanocomposite , small angle x ray scattering , chemical engineering , materials science , ionic bonding , polymer , polymer chemistry , salt (chemistry) , ionic conductivity , chemistry , composite material , organic chemistry , ion , scattering , physics , optics , engineering , electrode , electrolyte
This contribution describes the preparation and characterization of PEO/montmorillonite nanocomposite gels and films containing various lithium and sodium salts. The objective is to understand how the size and diffusion abilities of different ionic species added to these systems alter the crystallinity of the polymer, and affect the mechanical properties and ionic conductivities of the solid nanocomposites. The network strength of the polymer/clay dispersions influences decisively the crystallinity of the PEO chains and the final layered texture of the solid films. The characteristics of films were investigated using a combination of techniques, such as DSC, DMA, DEA, SEM, SAXS and XRD.