Thermal study of polypyrrole complexes with vermiculites of different layer charge

• Published in: Journal of thermal analysis and calorimetry Vol. 92; no. 1; pp. 43 - 51
• Main Authors: Ramírez-Valle, Veronica, Lerf, A., Wagner, F. E., Poyato, J., Pérez-Rodríguez, J. L.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Dordrecht Springer Netherlands 01-04-2008; Springer
• Subjects: Analytical Chemistry; Applied sciences; Chemistry; Chemistry and Materials Science; Composites; Exact sciences and technology; Forms of application and semi-finished materials; Inorganic Chemistry; Measurement Science and Instrumentation; Physical Chemistry; Polymer industry, paints, wood; Polymer Sciences; Technology of polymers; polypyrrole; vermiculite; polymerization; nanocomposite; interlayer cation; pyrrole; Fourier transformation; Polymerization; Differential thermal analysis; Nanostructure; Moessbauer spectrometry; NMR spectrometry; Silicates; X ray diffraction; Composite material; Silicon Compounds; Pyrrole derivatives; Infrared spectrometry; Iron III Compounds; Preparation; Vermiculite; Nanocomposite; Pyrrole polymer
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-007-8734-z

We have studied the synthesis of polypyrrole-clay nanocomposites by the in situ oxidative polymerization of pyrrole in the interlayer space of vermiculites with different layer charges from Santa Olalla and Ojén, Spain. Moreover, the influence of different interlayer cations (Na
+
, Mg
2+
, Fe
3+
) on the interaction between pyrrole and the vermiculties was studied. The resulting materials were characterized by means of DTA-TG, XRD, FTIR and Mössbauer spectroscopy. In all samples polymerization of pyrrole was observed, presumably triggered by the structural iron. In most cases it was found to be externally deposited. An uptake of pyrrole in the interlayer space and PPy formation is observed in the case of the Fe
3+
-intercalated Ojén vermiculite, which has a lower layer charge than the Santa Olalla vermiculite.