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Highly flame-retarding cotton fabrics with a novel phosphorus/nitrogen intumescent flame retardant
Peihua Zhao,Yaqing Liu,Xinhang Li,Mei Zhang,Shengnan Liu,Wenjun Liang 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.9
A novel phosphorus/nitrogen intumescent flame retardant, namely 6-chloro-4-(diethylamino phosphoratephosphoryl chloride)-2-(sodium 4-aminobenzensulfonate)-1,3,5-triazine (APPCABT), has been synthesized and charac-terized by elemental analysis, FT-IR,1H-NMR and31P{H}-NMR spectroscopies. To investigate the flame-retardingproperties of the treated cotton fabrics, APPCABT was applied to the chemical treatment of the cotton fabrics surface. The flame-retarding performance of the treated samples with APPCABT was evaluated by limiting oxygen index (LOI). The thermal degradation behavior of the treated samples was studied using thermogravimetric analysis (TGA). Thesurface morphology of the treated samples was observed by scanning electron microscopy (SEM). These results showthat APPCABT is both an intumescent flame retardant with high efficiency and an excellent char-forming agent forthe flame-retarding treatment of cotton fabrics.
Li-Qiong Liao,Yi-Zheng Fu,Xiao-Yan Liang,Lin-Yu Mei,Yaqing Liu 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.3
Molecular dynamics (MD) simulations have been used to study the diffusion behavior of small gas molecules (CO2) in polyethylene terephthalate (PET)/polylactide (PLA) blends. The Flory-Huggins interaction parameters (χ) determined from the cohesive energy densities are smaller than the critical value of Flory-Huggins interaction parameters (χcritical), and that indicates the good compatibility of PET/PLA blends. The diffusion coefficients of CO2 are determined via MD simulations at 298 K. That the order of diffusion coefficients is correlated with the availably fractional free volume (FFV) of CO2 in the PET/PLA blends means that the FFV plays a vital role in the diffusion behavior of CO2 molecules in PET/PLA blends. The slopes of the log (MSD) as a function of log (t) are close to unity over the entire composition range of PET/PLA blends, which confirmes the feasibility of MD approach reaches the normal diffusion regime of CO2 in PET/PLA blends.