A New Phosphorous/Nitrogen-Containing Flame-Retardant Film with High Adhesion for Jute Fiber Composites

Abstract

In this work, a novel P/N flame-retardant monomer (PDHAA) was synthesized through reacting phenyl dichlorophosphate (PDCP) with N-hydroxyethyl acrylamide (HEAA). The structure of PDHAA was confirmed using Fourier transform infrared (FTIR) spectroscopy and proton nuclear magnetic resonance (NMR) spectroscopy. PDHAA monomer and 2-hydroxyethyl methacrylate phosphate (PM-2) monomer were mixed at different mass ratios, to prepare UV-curable coatings, and then applied to the surface of fiber needled felts (FNFs), to improve their flame retardancy. PM-2 was introduced to reduce the curing time of the flame-retardant coatings and improve the adhesion between the coating and the fiber needled felts (FNFs). The research results indicated that the surface flame-retardant FNFs had a high limiting oxygen index (LOI) and rapidly self-extinguished in a horizontal combustion test and passed a UL-94 V-0 test. At the same time, the CO and CO2 emissions were greatly reduced, and the carbon residue rate was increased. In addition, the introduction of the coating improved the mechanical properties of the FNFs. Therefore, this simple and efficient UV-curable surface flame-retardant strategy has broad application prospects in the field of fire protection.

Flame-Retardant and Transparent Unsaturated Polyester Based on P/N Liquid Flame Retardants and Modified Halloysite Nanotubes

“…As shown in Figure 1b,c, the aromatic hydrogen protons of DOPO appeared at 6.91-8.00 ppm [38]. There were three peaks at 6.26 ppm, 6.09 ppm, and 5.64 ppm corresponding to H in -CH=CH 2 from HEAA [49,50]. The peaks at 4.16 ppm and 3.60 ppm were attributed to H in the CH 2 -CH 2 structure.…”

Comparative Study of Bis-Schiff Case Containing Conjugated Oligomers Based on Phosphate and Silane Moieties: Investigation of Photophysical and Thermal Properties

“…Phenyl dichlorophosphate, which features a phosphorus atom and a benzene ring, exhibits elevated thermal stability and is capable of engaging in reactions with monomers containing hydroxyl functionalities, , enabling the synthesis of phosphorus-containing flame-retardant monomers that confer exceptional flame-retardant characteristics upon polymers. − During the thermal degradation process, silicon carbide functions to protect the polymer residue from further decomposition at elevated temperatures. This protection arises from the presence of reaction products of silicon that persist on the surface of the char, ultimately leading to the formation of a protective silica layer.…”

Non-Flammable Epoxy Composition Based on Epoxy Resin DER-331 and 4-(β-Carboxyethenyl)phenoxy-phenoxycyclotriphosphazenes with Increased Adhesion to Metals

“…Another approach is to replace halogen-containing flame retardants with silicon-, phosphorus-, and/or nitrogen-containing ones, as well as their hybrids. Among siliconcontaining flame retardants, silicone resins are used [15], and among phosphorus-and/or nitrogen-containing ones, a mixture of diammonium hydrogen phosphate and urea [16], derivatives of DOPO [17][18][19] and DOPS [20], the product of the reaction of phenyldichlorophosphate with N-hydroxyethyl acrylamide [21], a reaction product of melamine and 2-[(5oxo-6H-phosphanthridin-5-yl)methyl]butanedioic acid [22], etc. However, phosphoruscontaining flame retardants, in particular organophosphates, have neurotoxic and carcinogenic properties, which requires their monitoring in the environment [23].…”