Abstract:

Down fibers were modified by synthesized reactive-type orgnophosphorus flame retardants. 1-phosphonopropane-1, 2 dicarboxylic acid had been synthesised via two-step method by using diethyl phosphate, diethyl maleate with the catalyst of sodium methylate. The final product were demonstrated by Fourier Transform Infrared Spectroscopy(FTIR), 13C-Nuclear Magnetic Resonance(13C-NMR), 31P-Nuclear Magnetic Resonance(31P-NMR). The content of phosphorous and the thermal stability, the morphology, the limiting oxygen index of the down fibers treated with reactive organic phosphorus flame retardant were characterized by Inductive Coupled Plasma-Atomic Emission Spectrometer(ICP/AES), TG-DTG Thermal Gravity(TG), Scanning Electron Microscope(SEM). Results showed that flame retardant property of treated down fibers improved with limiting oxygen index increased to 28.2 % from 23.8 %, the morphology of modified down fibers did not change significantly，the phosphorus content of modified down fibers increased from 0.0712 mg/g to 0.6838 mg/g, Moreover, the down fibers treated with the flame retardant showed an improvement in thermal stability.