Flame Retardant Finishing of Poly (ethylene terephthalate) Fabric with a Carbon Source Containing DOPO Derivative

TS195.592; 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)-based flame retardant (DOPO-DOPC) which contains carbon source was used to improve the flame retardancy of poly (ethylene terephthalate) (PET) fabrics.The prepared DOPO-DOPC dispersion was applied onto PET fabrics via two kinds of processes,thermosol process and exhaustion process,and in the later using it alone or together with disperse dyes.The flame retardancy of PET fabrics was determined by limiting oxygen index (LOI) and vertical burning test.The results showed that DOPO-DOPC could obviously improve the flame retardancy of PET fabrics.The PET fabric treated by 60 g/L DOPO-DOPC dispersion via exhaustion process achieved an LOI value of 32.3 ％,for example.The flame retardancy and dyeing performances showed that DOPO-DOPC dispersion could be used together with a part of disperse dyes in one bath.The thermal stability of DOPO-DOPC and the treated PET fabrics were investigated by thermogravimetric analysis (TGA).And the flame retardant mechanism of DOPO-DOPC treated PET fabrics was further investigated by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS),Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).