Crown ether‐modified clays and their polystyrene nanocomposites
- 1 September 2002
- journal article
- research article
- Published by Wiley in Polymer Engineering & Science
- Vol. 42 (9) , 1808-1814
- https://doi.org/10.1002/pen.11073
Abstract
Crown ether‐modified clays were obtained by the combination of sodium and potassium clays with crown ethers and cryptands. Polystyrene nanocomposites were prepared by bulk polymerization in the presence of these clays. The structures of nanocomposites were characterized by X‐ray diffraction and transmission electron microscopy. Their thermal stability and flame retardancy were measured by thermogravimetric analysis and cone calorimetry, respectively. Nanocomposites can be formed only from the potassium clays; apparently the sodium clays are not sufficiently organophilic to enable nanocomposite formation. The onset temperature of the degradation is higher for the nanocomposites compared to virgin polystyrene, and the peak heat release rate is decreased by 25% to 30%.Keywords
This publication has 12 references indexed in Scilit:
- Studies on the Mechanism by Which the Formation of Nanocomposites Enhances Thermal StabilityChemistry of Materials, 2001
- Fire Properties of Polystyrene−Clay NanocompositesChemistry of Materials, 2001
- Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materialsPublished by Elsevier ,2000
- Nanocomposites based on montmorillonite and unsaturated polyesterPolymer Engineering & Science, 1998
- New polymer electrolyte nanocomposites: Melt intercalation of poly(ethylene oxide) in mica‐type silicatesAdvanced Materials, 1995
- On the Nature of Polyimide-Clay Hybrid CompositesChemistry of Materials, 1994
- Mechanical properties of nylon 6-clay hybridJournal of Materials Research, 1993
- Synthesis of nylon 6–clay hybrid by montmorillonite intercalated with ϵ‐caprolactamJournal of Polymer Science Part A: Polymer Chemistry, 1993
- Ionic conductivity in layer silicates controlled by intercalation of macrocyclic and polymeric oxyethylene compoundsElectrochimica Acta, 1992
- Crown ether intercalations with phyllosilicatesNature, 1978