4 There were many related researches reporting on improving the flame retardance of SR by adding flame retardants or inorganic fillers, 4–7 such as red phosphorus, clay, Al(OH) 3, silica particles, wollastonite and so on. Therefore, it is significant to endow SR with satisfactory flame retardance through some modification methods. This flammability restricts the applications of SR in those fields which have strict fire-proofing requirements. 3 Despite that it possesses better flame retardancy as compared to other rubbers, SR exhibits self-sustaining combustion once ignited. 1,2 Over the past 60 years, the fast development of silicone materials has attracted the attention of the world. Introduction As one of the most important synthetic rubbers with excellent high and low temperature resistance, weathering ability, chemical resistance and good transparence, silicone rubber (SR) has been widely used in various fields including electrical industries, aerospace, automobile industry, etc. In addition, the corresponding physical properties such as transparence, dynamic and static mechanical performances were also evaluated. The char residues of the materials had been investigated in detail by Fourier transform infrared spectra (FT-IR) and X-ray photoelectron spectroscopy (XPS) to reveal the interactions between phosphaphenanthrene group and siloxane in the condensed phase.
Siloxane xps peak series#
A series of characterizations including vertical burning testing, limiting oxygen index (LOI), microscale combustion calorimetry (MCC), thermogravimetric (TG) analysis and scanning electronic microscopy (SEM) showed that this SR possessed much quicker self-extinguishment, lower heat release rate, higher LOI and thermal stability as well as better charring capacity compared with unmodified SR. A novel intrinsic flame retardant silicone rubber (SR) containing phosphaphenanthrene structure was synthesized in the present research.
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