Synthesis and Characterization of Aluminum 2-Carboxyethyl-Phenyl-Phosphinate and Its Flame-Retardant Application in Polyester

Abstract

A flame retardant aluminum 2-carboxyethyl-phenyl-phosphinate (CPA-Al) was synthesized through the salification reaction. The molecular structure of CPA-Al and thermal stability were characterized by solid nuclear magnetic resonance, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Subsequently, CPA-Al mixed in polyurethane was coated on polyester textile to obtain flame-retardant samples. The addition of 14.7 wt.% CPA-Al in textile sample can bring a limited oxygen index (LOI) value of 24.5%, 0 s after flame time, and the vertical burning B1 rating. Meanwhile, the incorporated CPA-Al reduced the peak heat release rate, total heat release, average effective heat of combustion, and increased the charring capacity of polyester textiles in contrast to the samples without CPA-Al. CPA-Al exerted not only its flame inhibition effect in gas phase, but also the charring and barrier effect in the condensed phase. Besides, with an increasing CPA-Al ratio in polyester textile, the contact angle gradually decreased from 123.6° to 75.6°, indicating that the surficial property of coating from hydrophobic to hydrophilic, thereby increasing the moisture permeability of polyester textile.

Core-Shell Graphitic Carbon Nitride/Zinc Phytate as a Novel Efficient Flame Retardant for Fire Safety and Smoke Suppression in Epoxy Resin

“…With the addition of g-C 3 N 4 , the quality of char residue improved slightly with many holes, which was attributed to the pyrolytic decomposition of g-C 3 N 4 . g-C 3 N 4 /PAZn-EP displayed a continuous and density char, indicated that it had good catalytic performance for char residues, which could provide a barrier to protect matrix, exhibiting excellent flame retardant and smoke suppression behavior [35]. The results are consistent with the CCT results.…”

Recycled polyester filled with eggshells waste-based nano CaCO3: thermo-mechanical and flame-retardant features

“…75 PHRR shows an intense decline with increasing content of ES-CaCO 3 nanofiller. Based on a previous report on the mechanism of PHRR, 76,77 the noticeably reduced PHRR here indicates increased of inhibition of firing, and reduction of the burning intensity. Thus, a better charring and barrier effect, retarding of combustion, a reduction of volatile smoke, and termination of the free radical chain reaction in the gaseous phase are expected.…”

“…57,58 The fire retardancy was tested using a Standard International Group (HK) cone calorimeter. According to ISO 5660, samples with dimensions of 100 Â 100 mm 2 were subjected to 50 kW m À2 ignition for 700 s. 59,60 3. Results and discussion…”

Functionalized Mesoporous Silica Fire Retardant via Hierarchical Assembly for Improved Fire Retardancy of Unsaturated Polyester

“…The av-EHC values of flameretarding UP composites were reduced by more than 20% compared with those of neat UP, which clearly indicated insufficient combustion in the gaseous phase. 38,39 DMMP possesses effective quenching in the gaseous phase but also increases the amount of smoke, as discussed. However, it is worth noting that the smoke emission of UP/NF3@SiO 2 -D decreased.…”