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Media type:
E-Article
Title:
Intercalated PS/Na+‐MMT Nanocomposites Prepared by Ultrasonically Initiated In Situ Emulsion Polymerization
Contributor:
Wang, Chao;
Wang, Qi;
Chen, Xinzhu
Published:
Wiley, 2005
Published in:
Macromolecular Materials and Engineering, 290 (2005) 9, Seite 920-926
Language:
English
DOI:
10.1002/mame.200500023
ISSN:
1438-7492;
1439-2054
Origination:
Footnote:
Description:
AbstractSummary: A new technique, ultrasonically initiated in situ emulsion polymerization, was employed to prepare intercalated polystyrene/Na+‐MMT nanocomposites. FTIR, XRD, and TEM results confirm that the hydrophobic PS can easily intercalate into the galleries of hydrophilic montmorillonite via ultrasonically initiated in situ emulsion polymerization, taking advantages of the multi‐effects of ultrasonic irradiation, such as dispersion, pulverization, activation, and initiation. Properly reducing SDS concentration is beneficial to widen the d‐spacing between clay layers. However, the Na+‐MMT amount has little effect on the d‐spacing of nanocomposites. The glass transition temperature of nanocomposites increased as the percentage of clay increased, although the average molecular weight of PS decreased, and the decomposition temperature of the 1obtained nanocomposites moves to higher temperature.TEM of PS/Na+‐MMT nanocomposite prepared by ultrasonically initiated in situ emulsion polymerization.magnified imageTEM of PS/Na+‐MMT nanocomposite prepared by ultrasonically initiated in situ emulsion polymerization.