Effects of comonomers and shear on the melt intercalation of styrenics/clay nanocomposites
- Effects of comonomers and shear on the melt intercalation of styrenics/clay nanocomposites
- 윤종태; 조원호; 이무성; 고문배
- Clay; Intercalation; Exfoliation
- Issue Date
- VOL 42, NO 1, 329-336
- The effect of polar comonomers introduced into polystyrene (PS) chains on the melt intercalation into organosilicate is investigated in
terms of shear and annealing time. In the case, where the interaction between polymers and silicate layers is relatively weak, e.g. PS/
organosilicate hybrids, it is difficult for the polymer chains to diffuse into interlayers of organosilicate and the hybrids are unstable under
shear. For hybrids in which the interaction is enhanced by incorporating polar comonomers, e.g. acrylonitrile (AN) and methylvinyl oxzoline
(OZ), their structures are stable even after a long mixing time. However, they do not show an exfoliated structure under the mixing conditions
used in this study. The interaction between the comonomer and the silicate surface is investigated indirectly via both X-ray diffractional and
FTIR spectral analyses. It is concluded that the structural stability of polymer/organosilicate hybrids is very dependent on the relative
magnitude of the interactions between polymers, organic modifiers, and silicate layers.
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