COMBINATION OF THE SILICONE-CONTAINING MACROMOLECULAR CHARRING AGENT WITH AMMONIUM POLYPHOSPHATE FOR IMPROVING FLAME RETARDANT OF POLYLACTIC ACID

摘要

A reported silicone-containing macromolecular charring agent (Si-MCA) was synthesized and characterized by FTIR, 13C NMR [1].The flame retardant of polylactic acid (PLA) with Si-MCA and ammonium polyphosphate (APP) were investigated.When the content of APP was 10％ and Si-MCA was 5％, the LOI was 35.6 and the UL 94 classed a V-0 rating.The peak heat release rate (PHRR) of the composite was decreased significantly and the increased char yield at high temperature further confirmed the improvement of the flame retardant.