Effect of DMMP on the pyrolysis products of polyurethane foam materials in the gaseous phase

2016 Global Conference on Polymer and Composite Materials

材料科学;化学

Liu, W.^1 ; Li, F.^1 ; Ge, X.G.^1 ; Zhang, Z.J.^1 ; He, J.^1 ; Gao, N.^1

Sichuan Fire Research Institute of Ministry of Public Security, Chengdu

610036, China^1

关键词: Dimethyl methylphosphonate;    Flame retardancy;    Fourier transform infrared spectrometry;    High temperature;    Infrared spectrometry;    Polyurethane Foam;    Pyrolysis products;    Retardant activities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/137/1/012037/pdf
DOI  :  10.1088/1757-899X/137/1/012037

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Dimethyl methylphosphonate (DMMP) has been used as a flame retardant containing phosphorus to decrease the flammability of the polyurethane foam material (PUF). Flame retardancy and thermal degradation of PUF samples have been investigated by the LOI tests and thermal analysis. The results show that LOI values of all PUF/DMMP samples are higher than that of the neat PUF sample and the LOI value of the samples increases with both DMMP concentration and the %P value. Thermal analysis indicates that flame retardant PUF shows a dominant condensed flame retardant activity during combustion. Thermogravimetric analysis-infrared spectrometry (TG-FTIR) has been used to study the influence of DMMP on the pyrolysis products in the gaseous phase during the thermal degradation of the PUF sample. Fourier transform infrared spectrometry (FTIR) spectra of the PUF sample at the maximum evolution rates and the generated trends of water and the products containing -NCO have been examined to obtain more information about the pyrolysis product evolutions of the samples at high temperature. These results reveal that although DMMP could improve the thermal stability of PUF samples through the formation of the residual char layer between fire and the decomposed materials, the influence of DMMP on the gaseous phase can be also observed during the thermal degradation process of materials.