Synthesis of a Novel Intumescent Flame Retardant Oligomer and its Application in ABS Copolymer
A novel intumescent flame retardant oligomer containing phosphorous-nitrogen structure (PSPTR) was synthesized and characterized by Fourier Transform Infrared (FTIR) and Mass Spectrometry (MS). The thermal behavior of PSPTR was investigated by thermogravimetric analysis (TGA). The TGA data shows that PSPTR has a high initial temperature of thermal degradation and a high char residue of 41.18wt% at 700 . A novel intumescent ﬂame retardant (IFR) system, which is composed of PSPTR and novolac phenol (NP), was used to impart ﬂame retardancy of ABS. The combustion behaviors of the ABS/IFR composites were investigated by Limiting Oxygen Index (LOI) and UL-94 tests. When the content of IFR (PSPTR:NP=1:1 mass ratio) is 30 wt%, the LOI value of ABS/IFR reaches 28.2, and the vertical burning test reaches UL-94 V-1 rating.
H.M. Zhang and B. Wu
X. P. Hu et al., "Synthesis of a Novel Intumescent Flame Retardant Oligomer and its Application in ABS Copolymer", Advanced Materials Research, Vols. 391-392, pp. 204-208, 2012