Flame-retardant behavior and mechanism of a DOPO-based
Qian X, Song L, Hu Y, et al. Combustion and thermal degradation mechanism of a novel intumescent flame retardant for epoxy acrylate containing phosphorus and nitrogen. Ind Eng Chem Res 2011; 50(4): 266–270.
Flame retardant effect and mechanism of a novel DOPO based
The flame retardant mechanism was ascribed to the barrier effect of intumescent and compact phosphorus-rich char layers with honeycombed cavity structure inside in the condensed phase, and quenching effect of phosphorous radicals and diluting effect of nonflammable gases in the gas phase.
A novel 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10
The effects of DOPOMAH and DOPO on comprehensive performance of EP were systematically investigated and compared through dynamic mechanical analysis, mechanical performance testing, limiting...
Synthesis of a novel flame retardant based on DOPO
An intumescent flame retardant (DOPO-DAM) containing phosphorus and nitrogen was synthesized viaa two-step process and then, it was incorporated into waterborne polyurethane to serve as a reactive flame retardant for preparing flame-retarded WPU (FR-WPU).
Flame-retardant behavior and mechanism of a DOPO-based
DOPO-M was blended into epoxy resin (EP) to prepare flame-retardant EPs. The flame-retardant and thermal properties of EPs cured with triethylenetetramine (TETA) were investigated by thermogravimetric analysis (TGA), the UL-94 test, and the limiting oxygen index (LOI) test.
- What is a Dopo flame retardant?
- Among them, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivatives have been widely used as reactive or additive flame retardants owing to good thermal stability and effective gaseous-phase flame extinguishing effect , , , .
- Can tetrazole derivative improve flame retardancy of epoxy resin?
- In this work, a novel DOPO based tetrazole derivative (ATZ) with highly efficient flame retardant activity was synthesized and incorporated into epoxy matrix as co-curing agent to dramatically improve the flame retardancy of epoxy resin. The chemical structure of ATZ was characterized by FTIR, 1 H-NMR, 13 C-NMR, 31P-NMR and elemental analysis.
- What is the mechanism of flame retardant in phosphorus-rich Char layers?
- The flame retardant mechanism was ascribed to the barrier effect of intumescent and compact phosphorus-rich char layers with honeycombed cavity structure inside in the condensed phase, and quenching effect of phosphorous radicals and diluting effect of nonflammable gases in the gas phase.
- Does Dopo-dam have flame retardant effects on WPU films?
- Thus, DOPO-DAM exhibited gas-phase and condensed-phase flame retardant effects on the WPU films.
- How does Dopo-dam affect flame retardancy of Fr-WPU?
- The results showed that the conjugation of DOPO-DAM into WPU induced a slight decline in the thermal stability of FR-WPU. However, the incorporation of DOPO-DAM into WPU significantly enhanced the flame retardancy by reducing the heat release rate (HRR), total heat release (THR), smoke production rate (SPR) and total smoke production (TSP).
- Can FAA-Dopo be used for copolymerization with polystyrene?
- In addition, in order to prove that FAA-DOPO can be used for copolymerization with polystyrene, our research group designed the flame retardant molecule by the ATRP method, synthesized PS- b -PFAA-DOPO with intrinsic flame retardants, and studied its flame retardant performance. 2. Experimental Section 2.1. Materials
