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Synthesis and Barrier Properties of Poly(ɛ-caprolactone)-layered Silicate Nanocomposites by Phillip B. Messersmith; Emmanuel P. Giannelis is a Materials Science article available to read on EtoBox.

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A new polymer-ceramic nanocomposite has been synthesized consisting of well-dispersed, two-dimensional layers of an organically modified mica-type silicate (MTS) within a degradable poly(c-caprolactone) matrix. A protonated amino acid derivative of MTS was used to promote delamination/dispersion of the host layers and initiate ring-opening polymerization of c-caprolactone monomer, resulting in poly(e-caprolactone) chains that are ionically bound to the silicate layers. The polymer chains can be released from the silicate surface by a reverse ion-exchange reaction and were shown to be spectroscopically similar to pure poly(e-caprolactone). Thick films of the polymer nanocomposite exhibit a significant reduction in water vapor permeability that shows a linear dependence on silicate content. The permeability of nanocomposite containing as low as 4.8% silicate by volume was reduced by nearly a n order of magnitude compared to pure poly(c-caprolactone).

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Author

Phillip B. Messersmith; Emmanuel P. Giannelis

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

1995

Language

EN

Field

Materials Science (Physical Sciences)