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- W2315697687 abstract "It was recently found that the ratio G'/η* plays an important role in determining whether exfoliated or intercalated nanoclay structures can be obtained in epoxy-nanoclay systems; G' and η* are the storage modulus and complex shear viscosity of crosslinking epoxy respectively inside and outside the clay galleries. In this study, the possible effects of quaternary ammonium ions on the values of G'/η* ratio were investigated. The first effect was that of plasticization of crosslinked epoxy networks inside the clay galleries by hydrocarbon chains of quaternary ammonium ions, which slowed down the growth of G'. Second, the quaternary ammonium ions derived from primary amines dissociated at elevated temperatures generating amines, which reacted with the epoxide groups, causing an imbalance in stoichiometry. This led to reduction of crosslink density and further plasticization by excess amines." @default.
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- W2315697687 date "2004-01-01" @default.
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- W2315697687 title "Plasticization of epoxy network in epoxy-nanoclay systems due to stoichiometric imbalance" @default.
- W2315697687 hasPublicationYear "2004" @default.
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