Increasing time of ignition for PS-clay nanocomposites filled with [Fe(bpy)3]2+-modified hectorite. (June 2016)

• Record Type: Journal Article
• Authors: Hausner, Josef; Fischer, Bianca; Stöter, Matthias; Edenharter, Andreas; Schmid, Jasmin; Kunz, Raphael; Rosenfeldt, Sabine; Altstädt, Volker; Breu, Josef
• Is Part Of: Polymer degradation and stability. Volume 128(2016:Jun.)
• Page Start: 141
• Page End: 148
• Publication Date: 2016-06
• Subjects: PS-clay nanocomposites -- Hectorite -- Flame retardancy -- Time of ignition; Polymers -- Deterioration -- Periodicals; Stabilizing agents -- Periodicals; Polymères -- Dégradation -- Périodiques; Stabilisants -- Périodiques; 668.9
• DOI: 10.1016/j.polymdegradstab.2016.03.015
• Languages: English
• ISSNs: 0141-3910

Abstract

Abstract: While previously reported polystyrene(PS)-clay nanocomposites all show a reduced time of ignition (tig ) compared to the neat polymer, we observe a significant longer tig for a clay filler that has been modified with a highly temperature stable inorganic complex cation, trisbipyridine-iron(II) ([Fe(bpy)3 ] 2+ ). We compare cone data of nanocomposites filled with [Fe(bpy)3 ] 2+ - and alkylammonium(C18)-modified synthetic hectorite. While the peak of heat release was reduced to a comparative value (50% and 54% for [Fe(bpy)3 ] 2+ - and C18-modified composite, respectively), tig was significantly increased (76 ± 3 s, 84 ± 1 s, and 66 ± 1 s for PS, for [Fe(bpy)3 ] 2+ - and C18-modified composite, respectively). Moreover, the total smoke production was also reduced significantly (5017, 4415, and 5127 m 2 /m 2 for PS, for [Fe(bpy)3 ] 2+ - and C18-modified composite, respectively). The clay nanocomposites were characterized by powder X-ray diffraction, transmission electron microscopy, and gas permeability measurements.