Properties of SBR, NBR and EPDM vulcanizates reinforced by layered silicates.

Monika J. Malesa 1Leszek Pysklo 1Wanda B. Parasiewicz 1Ludomir Ślusarski 2,3

1. Instytut Przemysłu Gumowego STOMIL (IPGUM), Harcerska 30, Warszawa 08-820, Poland
2. Technical University of Łódź, Institute of Polymers, Stefanowskiego 12/16, Łódź 90-924, Poland
3. Technical University of Łódź, Faculty of Chemistry, Institute of Polymer and Dye Technology (PŁ), Stefanowskiego 12/16, Łódź 90-924, Poland


The aim of the research was to obtain rubber composites based on SBR, NBR and EPDM and montmorillonite intercalated with ammonium cations having long alkyl chains (Cloisite®10A and 15A) and to study the influence on vulcanizates properties. To further improve dispersion of organoclay in EPDM compounds blend of EPDM and maleic anhydride grafted EPDM-M was applied. Additionally the intercalated organoclays were modified with oleic acid. The best reinforcement by the intercalated montmorillonites was obtained in NBR and EPDM/EPDM-M (85/15) compounds. Modification of the intercalated montmorillonites with oleic acid also improved their dispersion in SBR and EPDM compounds and increased level of reinforcement.

Results: Because of better dispersion of organoclays in polar rubber NBR the achieved level of reinforcement was higher than for non-polar rubbers SBR and EPDM. To improve dispersion of organoclays in non-polar rubbers SBR and EPDM and increase level of reinforcement compatibilizers should be used. The good compatibilizer for EPDM compounds is maleic anhydride grafted EPDM (less than 2% of maleic anhydride). Improvement of organoclay dispersion in SBR and EPDM compounds can also be achieved by additional modification of organoclay with oleic acid.

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Presentation: Poster at E-MRS Fall Meeting 2006, Symposium D, by Monika J. Malesa
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-07-04 13:51
Revised:   2009-06-07 00:44
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