A bio-based phosphaphenanthrene-containing derivative
DOPO, as an attractive phosphorus-containing flame retardant, has attracted extensive attention in recent years. 13 Because of the highly active P–H bond in its molecule, DOPO can react with epoxy group, C C bond, carbonyl group, Schiff base, and amino group to prepare a series of DOPO derivatives. 14 Compared with traditional halogen-containing
A phosphorus-containing hyperbranched phthalocyanine flame
A typical phosphorus-containing flame retardant, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), has been proved to be the effective flame retardant for epoxy resins 8. DOPO exhibit
An overview of some recent advances in DOPO-derivatives
These DOPO-derivatives are used as flame retardants mainly in epoxy resins [3], [5], [11], [12], [13], [15], for applications in adhesives, composites, printed wiring boards and others [17]. As some halogenated flame retardants have been found to be toxic, the research on halogen-free flame retardants is gaining more and more importance [18].
Recyclable flame-retardant epoxy composites based on
Herein, this work aims to prepare epoxy composites with a good balance in flame retardancy and recyclability. Friendly DOPO is used as flame retardant of recyclable EP, which is likely to play important role in both gas phase and condensed phase. With only a small loading of flame retardant, the epoxy composite shows good flame retardancy.
Phosphorus Containing Polyacrylamides as Flame Retardants
Abstract. Novel polymeric flame retardants based on two acrylamides and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) or 5,5-dimethyl- [1,3,2]dioxaphosphinane-2-oxide (DDPO) are described for several applications in HexFlow RTM6, a high-performance epoxy resin. Neat resin samples and carbon fiber-reinforced composites were tested
- What are reactive Dopo based flame retardants for epoxy resins?
- This review focuses on recent advances in reactive DOPO–based flame retardants for epoxy resins, including reactive monomers, curing agents and hybrid structures. There are also highlighted fire retardant mechanisms of the DOPO derivatives and thermal and mechanical features of the epoxy systems.
- Are phosphorous oxidation states a flame retardant for epoxy resins?
- In conclusion, three kinds of DOPO-based derivatives with multiple phosphorous oxidation states were synthesized and applied as flame retardants for epoxy resins. FTIR and NMR spectra confirmed the successful synthesis of these DOPO-based derivatives.
- Which phosphorus containing flame retardants are effective?
- Due to the excellent flame retardancy, flame retardants, which contain phosphorus element, have been developed and successfully applied [10, 11]. Among the developed phosphorus-containing flame retardants, DOPO and DOPO derivatives showed promising flame retardant [12, 13, 14].
- Which is the best flame retardant for epoxy resin?
- Among them, 9,10-dihydro-9-oxo-10-phosphaphenanthrene-10-oxide (DOPO) has become the most widely studied and most promising flame retardant in the field of flame retardant epoxy resin [31, 32].DOPO and its derivatives can be used as reactive and additive flame retardants in epoxy resins.
- Are phosphorus-containing flame retardants suitable for EP resins?
- Phosphorus-containing flame retardants have been intensively studied for EP resins [ 10, 11 ].
- Is Dopo a flame retardant?
- DOPO contains a reactive hydrogen bond which reacts easily with epoxy resins, aldehydes, acrylates, activated double bonds of benzoquinone, making it either a good flame retardant additive precursor or an integrative flame retardant . Hence, hydrogen phosphinates or phosphonates may be attached directly to an epoxy resin.
