Effects of comonomers and shear on the melt intercalation of styrenics/clay nanocomposites

Title
Effects of comonomers and shear on the melt intercalation of styrenics/clay nanocomposites
Authors
윤종태조원호이무성고문배
Keywords
Clay; Intercalation; Exfoliation
Issue Date
2001-01
Publisher
Polymer
Citation
VOL 42, NO 1, 329-336
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/13642
ISSN
0032-3861
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KIST Publication > Article
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