Computer simulation studies of PEO/layer silicate nanocomposites

Monte Carlo and molecular dynamics computer simulations are used to explore the atomic scale structure and dynamics of intercalated PEO/montmorillonite nanocomposites. Particular attention is paid to the configuration of the polymer within these confined spaces. A layered, but disordered and liquid-like, structure is observed, in contrast to the all-trans or helical extended interlayer structures traditionally suggested. The cations primarily reside near the silicate surface. Molecular dynamics simulations also provide information on the interlayer mobility of Li⁺ ions, which is related to the ionic conductivity in polymer electrolyte nanocomposites.