Abstract
A new silicon-phosphorus hybrid (SPH) flame retardant was synthesized by condensation reaction of 1-oxo-4-hydroxymenthyl-2,6,7-trioxa-1-phosphabicy[2,2,2] octane (PEPA) with waste silicon oil which is mainly consisted of the compounds of CxHySizCln. The effect of Si/P hybrid on the flame retardancy of polypropylene composites (PP/Si-P) was studied by limiting oxygen index (LOI) test and thermogravimetric analysis (TGA). The flame retarding performance of PP/SPH/MP/PER at the same loading amount is slightly higher relative to MP/PER. This, in plus to the low cost and the value in environmental protecting, makes SPH possess the application potential in flame retardants.
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