Abstract
The flame retardant modification of epoxy (EP) is of great signification for aerospace, automotive, marine, and energy industries. In this study, a series of EP composites containing different variations of phosphorus-containing polysulfone (with a phosphorus content of approximately 1.25 wt %) were obtained. The obtained EP/polysulfone composites had a high glass transition temperature (Tg) and high flame retardancy. The influence of phosphorus-containing compounds (ArPN2, ArPO2, ArOPN2 and ArOPO2) on the thermal properties and flame retardancy of EP/polysulfone composites was investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), a UL-94 vertical burning test, and cone calorimeter tests. The phosphorus-containing polysulfone enhanced the thermal stability of EP. The more stable porous char layer, less flammable gases, and a lower apparent activation energy at a high degree of conversion demonstrated the high gas inhibition effect of phosphorus-containing compounds. Moreover, the gas inhibition effect of polysulfone with a P–C bond was more efficient than the polysulfone with a P–O–C bond. The potential for optimizing flame retardancy while maintaining a high Tg is highlighted in this study. The flame-retardant EP/polysulfone composites with high thermal stability broaden the application field of epoxy.
Highlights
Epoxy resin (EP) and its composites, as advanced composite materials, are essential for the aerospace, automotive, marine, and energy industries
The conversion rate increased to 70~85%, their a values were higher than those of andWhen their EP composites
thermogravimetric analysis (TGA) and cone calorimeter tests illustrated that the polysulfones containing a P–O–C bond showed a stronger char forming the EP composites those with a(ArPN
Summary
Epoxy resin (EP) and its composites, as advanced composite materials, are essential for the aerospace, automotive, marine, and energy industries. Several flame elements havenegligible shown negative that an effects addition ofTpolysulfone containing phosphate canretardant improve the flame g , which is highly (phosphorus, nitrogen, sulfur, etc.) of and groups can be incorporated into backbones sideglass retardant properties of EP, the silicon, influence phosphorus-containing polysulfones onorthe chains of polymeric flame retardants and play a “group synergistic effect”. Previous studies have shown that an addition of polysulfone containing phosphate can of EP composites, polysulfone with different phosphorus-containing chemical structures is improve the flame retardant properties of EP, the influence of phosphorus-containing polysulfones on used to prepare of EP composites. In order to determine the structure–property effect on the flame retardancy and Tg of polysulfone with different phosphorus-containing structure, the thermal and flame-retardant. To evaluate the influence polysulfone with different phosphorus-containing structure, the thermal and flame-retardant properties of EP composites were
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
