Two organophilic bentonites, based on nitrogen-containing compounds, have been synthesised viaion exchange starting from pristine bentonite with octadecyltrimethylammonium bromide (OTAB)and with synthetic melamine-derived N2,N4-dihexadecyl-1,3,5-triazine-2,4,6-triamine (DEDMEL).The chemical and morphological characterization of the organoclays was based on XRD, TEM,Laser Granulometry, X-Ray Fluorescence and CEC capacity. Copoly(styrene-butadiene-styrene)-nanocomposites (SBS-nanocomposites) were obtained by intercalation of the SBS-copolymer intothese new organoclays by melt intercalation method. XRD and TEM analysis of the organoclaysand of the micro/nano-composites obtained are presented. The effect of the organoclays on theSBS-nanocomposite’s flammability properties was investigated using cone calorimeter. An encouragingdecrease of 20% in the peak heat released rate (PHRR) has been obtained confirming theimportant role of melamine’s based skeleton and its derived organoclays to act as effective fireretardants and for the improvement of this important functional property in SBS copolymers.
Bentonite-based organoclays as innovative flame retardants agents for SBS copolymer / M., Comes Franchini; FABBRI, Paola; A., Frache; ORI, GUIDO; MESSORI, Massimo; SILIGARDI, Cristina; A., Ricci. - In: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY. - ISSN 1533-4880. - STAMPA. - 8:12(2008), pp. 6316-6324. [10.1166/jnn.2008.379]
Bentonite-based organoclays as innovative flame retardants agents for SBS copolymer
FABBRI, Paola;ORI, GUIDO;MESSORI, Massimo;SILIGARDI, Cristina;
2008
Abstract
Two organophilic bentonites, based on nitrogen-containing compounds, have been synthesised viaion exchange starting from pristine bentonite with octadecyltrimethylammonium bromide (OTAB)and with synthetic melamine-derived N2,N4-dihexadecyl-1,3,5-triazine-2,4,6-triamine (DEDMEL).The chemical and morphological characterization of the organoclays was based on XRD, TEM,Laser Granulometry, X-Ray Fluorescence and CEC capacity. Copoly(styrene-butadiene-styrene)-nanocomposites (SBS-nanocomposites) were obtained by intercalation of the SBS-copolymer intothese new organoclays by melt intercalation method. XRD and TEM analysis of the organoclaysand of the micro/nano-composites obtained are presented. The effect of the organoclays on theSBS-nanocomposite’s flammability properties was investigated using cone calorimeter. An encouragingdecrease of 20% in the peak heat released rate (PHRR) has been obtained confirming theimportant role of melamine’s based skeleton and its derived organoclays to act as effective fireretardants and for the improvement of this important functional property in SBS copolymers.
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