Modification and characterization of montmorillonite fillers used in composites with vulcanized natural rubber

Hrachová, Jana, Chodák, Ivan and Komadel, Peter Modification and characterization of montmorillonite fillers used in composites with vulcanized natural rubber Chemical Papers, Vol.63, No. 1, 2009, 55-61

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  

Author(s) Hrachová, Jana
Chodák, Ivan
Komadel, Peter
Title Modification and characterization of montmorillonite fillers used in composites with vulcanized natural rubber
Journal name Chemical Papers
Publication date 2009
Year available 2009
Volume number 63
Issue number 1
ISSN 0366-6352
Start page 55
End page 61
Place of publication Poland
Publisher Versita
Collection year 2009
Language english
Subject 250000 Chemical Sciences
250200 Inorganic Chemistry
Abstract/Summary Parent Ca-montmorillonite (Jelšový Potok, Slovakia, Ca-JP) and Na-montmorillonite Kunipia-F (Japan, Na-KU) were ion-exchanged with octadecyltrimethylammonium (ODTMA) cations. Characteristics of the samples were studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (IR) and thermogravimetry (TG). Surface areas were measured by sorption of N2 and ethyleneglycol monoethyl ether. Scanning electron microscopy photographs (SEM) were used to characterize the texture of samples. The XRD patterns show that, upon intercalation, the basal spacing of montmorillonite is expanded and corresponds to the pseudotrimolecular arrangement of organic cations in the interlayers. The IR spectra of organically modified montmorillonite show C-H stretching and bending bands of both CH3 and CH2 groups in the 3000–2800 cm−1 and 1500–1400 cm−1 region, respectively. Modification of montmorillonite by organic cations decreased the hydrophilicity of their mineral surface and adsorbed water evaporated at lower temperatures. The SEM photographs reveal a tendency towards lump formation and agglomeration of the ODTMA-montmorillonite particles. The modification introducing organic moiety lead to a substantial decrease in the surface area of both montmorillonites; however, it remained remarkably high, being at the level typical for silica. Completely characterized fillers were used to prepare rubber compositions with enhanced physical properties, as described in Hrachová et al. (2008).
 
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Created: Fri, 19 Mar 2010, 09:09:36 CET by Jana Taptičová . Detailed History