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Synthesis of montmorillonite/polystyrene nanocomposites in supercritical carbon dioxide
Author(s) -
Dong Zexuan,
Liu Zhimin,
Zhang Jianling,
Han Buxing,
Sun Donghai,
Wang Yong,
Huang Ying
Publication year - 2004
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.21028
Subject(s) - montmorillonite , materials science , thermogravimetric analysis , polystyrene , supercritical carbon dioxide , differential scanning calorimetry , nanocomposite , supercritical fluid , thermal stability , chemical engineering , monomer , polymer chemistry , radical polymerization , polymerization , styrene , copolymer , polymer , composite material , organic chemistry , chemistry , physics , engineering , thermodynamics
Monomer styrene and initiator N,N ′‐azobis(isobutyronitrile) were impregnated into montmorillonite (MMT) galleries using supercritical CO 2 at 35°C and 12.0 MPa, after thermal polymerization of monomer at 65°C, resulting in MMT/polystyrene nanocomposites. The morphology and structure of the products were characterized by FTIR, powder X‐ray diffraction, transmission electron microscopy, differential scanning calorimetry, and thermogravimetric analysis. The results indicate that MMT is dispersed in the composite with intercalated and exfoliated structures, enhancing the thermal stability of nanocomposites. Changing the soaking time and the content of MMT in the supercritical solution during the impregnating process can control the exfoliated extent of MMT. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 1194–1197, 2004