Surface migration and effect of ionomer network on ethylene-based copolymer–CaCO3–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.

[1]  Ashish Batra,et al.  Counterion Effect on the Rheology and Morphology of Tailored Poly(dimethylsiloxane) Ionomers , 2006 .

[2]  Claire Longuet,et al.  Calcium and aluminum-based fillers as flame-retardant additives in silicone matrices. III. Investigations on fire reaction , 2013 .

[3]  Mel Marielle Wouters,et al.  Ionomeric thermoplastic elastomers based on ethylene-propylene copolymers , 2000 .

[4]  Claire Longuet,et al.  Flame retardancy of silicone-based materials , 2009 .

[5]  Ashish Batra,et al.  Synthesis and Rheology of Tailored Poly(dimethylsiloxane) Zinc and Sodium Ionomers , 2006 .

[6]  Richard H. Harris,et al.  Nanoparticle networks reduce the flammability of polymer nanocomposites , 2005, Nature materials.

[7]  Sati N. Bhattacharya,et al.  Rheology of LLDPE, LDPE and LLDPE/LDPE blends and its relevance to the film blowing process , 2000 .

[8]  Thomas Hjertberg,et al.  The flame retardant mechanism of polyolefins modified with chalk and silicone elastomer , 2003 .

[9]  Thomas Hjertberg,et al.  Distribution of calcium carbonate and silicone elastomer in a flame retardant system based on ethylene–acrylate copolymer, chalk and silicone elastomer and its effect on flame retardant properties , 2006 .

[10]  M. Zulfiqar,et al.  Preparation and degradation of salts of poly(methacrylic acid)—Part II: Magnesium, calcium, strontium and barium salts , 1979 .

[11]  Nianhua Huang,et al.  Studies of the Action of Silicone at the Interphase on the Flame Retardant System of EBA Copolymer-chalk , 2009 .

[12]  Charles A. Wilkie,et al.  An XPS investigation of thermal degradation and charring of cross-linked polyisoprene and polychloroprene , 2001 .

[13]  Toshiro Masuda,et al.  Dynamic Viscoelasticity of Ionomers Based on Ethylene-co-Methacrylic Acid Copolymer in the Melt State , 1999 .

[14]  Patrick Van Hees,et al.  On the intumescence of ethylene-acrylate copolymers blended with chalk and silicone , 2007 .

[15]  I. C. Mcneill,et al.  Thermal degradation behaviour of acrylic salt polymers and ionomers , 1998 .

[16]  D. Briggs,et al.  Practical surface analysis: By auger and x-ray photoelectron spectroscopy , 1983 .

[17]  Claire Longuet,et al.  Calcium and aluminium-based fillers as flame-retardant additives in silicone matrices. I. Blend preparation and thermal properties , 2010 .