Synthesis and characteristics of a novel silicon‐containing flame retardant and its application in poly[2,2‐propane‐(bisphenol)carbonate]/acrylonitrile butadiene styrene

Abstract

Novel halogen‐free compounds [9,10‐dihydro‐9‐oxa‐10‐phosphaphanthrene‐10‐oxide/vinyl methyl dimethoxysilane/N‐β‐(aminoethyl)‐γ‐aminopropyl methyl dimethoxysilane (DOPO–VMDMS–NMDMS)] that simultaneously contain phosphorus, nitrogen, and silicon have been synthesized through the reaction of 9,10‐dihydro‐9‐oxa‐10‐phosphaphanthrene‐10‐oxide (DOPO), vinyl methyl dimethoxysilane (VMDMS), and N‐β‐(aminoethyl)‐γ‐aminopropyl methyl dimethoxysilane (NMDMS). The chemical structure and properties of DOPO–VMDMS–NMDMS have been investigated with Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, phosphorous nuclear magnetic resonance, and thermogravimetric analysis (TGA). These synthesized flame retardants have been blended with a poly[2,2‐propane‐(bisphenol) carbonate]/acrylonitrile butadiene styrene (PC/ABS) alloy. The flame‐retardant properties of these mixture samples have been estimated with the limiting oxygen index (LOI), and the thermal stability has been characterized with TGA. The LOI value of PC/ABS/DOPO–VMDMS–NMDMS is enhanced up to 27.2 vol % from 21.2 vol %, and the char yield is also improved slightly (from 12 to 17%) with 2.8 wt % phosphorus, 3.0 wt % silicon, and 0.5 wt % nitrogen (at a 30 wt % loading of DOPO–VMDMS–NMDMS). The results show that there is a synergistic effect of the elements phosphorus, silicon, and nitrogen on the flame retardance. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 1542–1551, 2007

Mechanical and thermal properties and flame retardancy of phosphorus-containing polyhedral oligomeric silsesquioxane (DOPO-POSS)/polycarbonate composites

“…Novel silicon-containing and phosphorus-containing compounds used as flame retardants for polycarbonate and its blends have received increasing attention owing to their environmental friendliness [5,6]. Triphenyl phosphate (TPP), resorcinol bis(diphenyl phosphate) (RDP), and bisphenol-A bis(diphenyl phosphate) (BDP) have achieved great commercial success as flame retardants for PC and its blends.…”

Synthesis of a novel hybrid synergistic flame retardant and its application in PP/IFR

“…It has been ascertained as an efficient way to improve the fire resistance of polymer composite by addition of silicon-based flame retardants. Typically, silicon, phosphorus and nitrogen-containing flame retardants have been verified to own good anti-flammability property [3,4]. Attention is noticed that not only should flame retardants be harmless, but also the synthetic route should be green on the basis of nontoxic solvent, environmental & renewable raw materials, recyclable, etc [5].…”

Synthesis of novel intumescent flame retardant containing phosphorus, nitrogen and boron and its application in polyethylene

“…Environment protectors have resisted the large-scale use of halogen-containing flame retardants and advocated the wide application of alternative chemical products [12]. So, halogen-free flame retardants such as intumescent flame-retardant (IFR) systems have been developed rapidly and widely applied in the field of flame-retardant polymers, especially in polyolefin due to their advantages of low smoke, low toxicity, no corrosion [13][14][15] and higher flame resistance efficiency. Typically, IFR plays an effective flame resistance role mainly by the condensed-phase mechanism [16][17][18][19].…”