Restricted accessResearch articleFirst published online 2012-5
Surface migration and effect of ionomer network on ethylene-based copolymer–CaCO 3 –PDMS fire-retardant systems studied by rheological analysis and X-ray photoelectron spectrometry
The “barrier” mechanism in the condensed phase has long been accepted as the dominant mechanism for the halogen-free, flame-retardant polymeric composites. In previous work from this laboratory, surface-sensitive X-ray photoelectron spectroscopy was used on a silicone-containing system. It turns out that migration to the surface cannot be disregarded in studying the flame-retardant polymeric systems. With the help of rheological measurements, combined with the conventional flammability tests (cone calorimetry, loss on ignition, thermal gravimetric analysis, etc.), a mixed double-layered model has been tentatively identified.
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