S. Hu, L. Song, H. F. Pan and Y. Hu (2012) Thermal Properties and Combustion Behaviors of Chitosan Based Flame Retardant Combining Phosphorus and Nickel. Journal/Industrial &, Engineering Chemistry Research 51 3663-3669. [In English]
Web link: http://dx.doi.org/10.1021/ie2022527
Keywords: PARTIALLY DEACETYLATED CHITIN, FUNCTIONAL POLYMERS, CHARRING AGENT, POLYPROPYLENE, PHOSPHATE, NANOCOMPOSITES, INTUMESCENCE, FLAMMABILITY, FORMULATIONS, DERIVATIVES
Abstract: A renewable carbonization agent based compound nickel chitosan phosphate (NiPCS) has been prepared, which was the combination of flame retardant and synergist. Its effect on thermal properties and flammability of poly(vinyl alcohol) (PVA) has been investigated. Microscale combustion calorimetry (MCC) test proved that NiPCS can decrease the intensities of heat release rate (PHRR) and total heat release rate (THR) greatly. Thermogravimetric analysis (TGA) results indicated that NiPCS possessed a high formation of char. With the increase of the flame retardant, the thermal stability of materials enhanced in high temperature. Real time Fourier transform infrared (RT-IR) data confirmed that the flame retardant can promote the dehydration effect as well as accelerate the char forming. The volatilized products and the synergistic effect of nickel on thermal properties were both investigated with thermogravimetric analysis/infrared spectrometry (TGA-IR) and laser Raman spectroscopy (LRS). The results revealed that nickel restrained the thermal degradation of materials as well as improved the structural organization level of char.