Abstract
An organic phosphorus-nitrogen containing flame retardant melamine polyphosphate (MPP) was synthesized with two-step approach using melamine and phosphoric acid, and characterized through Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance analysis. The intumescent flame retardant (IFR) coatings were prepared using MPP, pentaerythritol (PER) and anatase-type TiO2 as FR additives and acrylic emulsion as a binder, and applied to cotton/polyethylene terephthalate (C/T) blends. The vertical flame and cone calorimeter tests were carried out to measure after-flame time, damaged length, limiting oxygen index and peak heat release rate, confirming the good flame retardancy being enhanced with increasing the content of TiO2 in the coatings. The scanning electron micrography images showed formation of numerous pores and voids on the C/T blend samples treated with only MPP and PER while the formation of compact and dense char layer with no void by adding TiO2. Through the thermogravimetric, FTIR, and X-ray diffraction analysis, it was revealed that the three-stage degradation of MPP/PER coatings released incombustible water vapor and ammonia gas, while TiO2 could react with polyphosphoric acid to produce titanium pyrophosphate ceramic layer covering the char layer.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
