Journal
APPLIED CLAY SCIENCE
Volume 62-63, Issue -, Pages 94-100Publisher
ELSEVIER
DOI: 10.1016/j.clay.2012.04.009
Keywords
Cloisite 25A and 30B; Exfoliation; Polyesteramides; Organocation-solvent interaction; Polymer-solvent interaction
Funding
- Grant Agency of the Czech Republic [106/09/1378]
- Ministry of Education, Youth and Sports of the Czech Republic [MSM 6046137302]
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Novel clay mineral polymer nanocomposites (CPN) were prepared by direct addition of a polyesteramide (PEA) solution to organomontmorillonites (OMt). PEA matrices were obtained by the anionic copolymerization of epsilon-caprolactam (CIA) and epsilon-caprolactone (CLO) containing 20-100 mol% of CLO units. The matrices were used to test the exfoliation of two OMt (Cloisite 30B and Cloisite 25A). The extent of exfoliation was dependent on the mutual interaction of all three components (polymer, solvent and OMt). The degree of OMt-solvent interaction was assessed from the swelling factor and basal distance, the latter being measured by the WAXS method. The polymer-solvent interaction was determined from the limiting viscosity numbers measured for each solvent used. Several of the copolymer-solvent-OMt combinations resulted in nanocomposites with a fully- or partially-exfoliated structure. (C) 2012 Elsevier B.V. All rights reserved.
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