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Preparation of polystyrene/montmorillonite nanocomposites in supercritical carbon dioxide
Author(s) -
Yan Chong,
Ma Li,
Yang Jichu
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21996
Subject(s) - montmorillonite , materials science , polystyrene , supercritical carbon dioxide , nanocomposite , intercalation (chemistry) , glass transition , thermal decomposition , supercritical fluid , chemical engineering , polymer chemistry , radical polymerization , polymerization , polymer , composite material , chemistry , organic chemistry , engineering
The preparation of polystyrene (PS)/montmorillonite (MMT) composites in supercritical carbon dioxide (SCCO 2 ) was studied. Lipophilic organically modified MMT can be produced through an ion‐exchange reaction between native hydrophilic MMT and an intercalating agent (alkyl ammonium). PS/clay composites were prepared by free‐radical precipitation polymerization of styrene containing dispersed clay. X‐ray diffraction and transmission electron microscopy indicated that intercalation of MMT was achieved. PS/clay composites have a higher thermal decomposition temperature and lower glass‐transition temperature than pure PS. The IR spectrum analysis showed that the solvent of SCCO 2 did not change the structures of the PS molecules, but there were some chemical interactions between the PS and the clay in the composites. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 22–28, 2005
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