Epoxy resin modified with chitosan derivatives and DOPO
The exploration of halogen-free flame retardants has become a major direction for the study of epoxy resins with flame retardancy [7,8]. For the requirement of green chemistry and the concept of sustainable development, it has become one of the hot topics to use renewable and easily degradable biological materials to increase the flame
GC DOPO Halogen-Free Flame Retardants - Greenchemicals
GC DOPO Halogen-Free Flame Retardants - Greenchemicals Home Products Flame Retardants Halogen-Free Flame Retardants GC DOPO GC DOPO PDF Chemical Name 9,10-Diidro-9-ossa-10-fosfafenantrene 10-ossido CAS NO. 35948-25-5 Description Epoxy resins Category Halogen-Free Flame Retardants Applications Polyamides, Polyesthers, Polyurethanes
Halogen-Free flame retardants - Greenchemicals
GC EP HF 730 C is an efficient and environmentally friendly, halogen free, flame retardant blend. It is completely without halogens and extremely thermostable. GC EP HF 730 C does not release dioxins and has good mechanical, thermal and electrical properties. GC EP HF 730 C shows excellent color stability.
A novel flame retardant derived from DOPO and piperazine and
A novel flame retardant poly (piperazine phosphaphenanthrene) (DOPMPA) was successfully synthesized via two step reactions using DOPO and piperazine as reactants and characterized by infrared...
Flame-Retarded Epoxy Resins with a Curing Agent of DOPO
Wirasaputra et al. [27] synthesized a tri-anhydride compound containing DOPO and triazine moieties and used as a halogen-free flame retardant co-curing agent for diglycidyl ether of bisphenol A
- Do non-halogenated flame retardant agents improve the performance of polystyrene?
- This comparison aims to demonstrate the advantages of using non-halogenated flame retardant agents (PON) in combination with expanded graphite (EG) for enhancing the flame retardant performance of polystyrene. Table 4. The reported flame retardant polystyrene compare to PS/10%PON/10%EG composites. 4. Conclusion
- Can halogenated polymers reduce flammability?
- To date the addition of flame-retardants (FRs) with polymers has been considered an easy and effective way to reduce their flammability . Traditionally, halogenated compounds can significantly reduce the flammability of PS, but often lead to the evolution of toxic substances and dense smoke [10, 11].
- Which carbon forming agent has the best flame retardant effect in polystyrene?
- Successful synthesis and analysis of a novel P–N flame-retardant. The combination of EG (carbon-forming agents) and PON shows the best flame retardant effect in polystyrene among the five carbon-forming agents. PS/10%PON/10%EG showed excellent flame retardancy and smoke suppression performance.
- What are halogen-free flame-retardants?
- In order to solve this problem, various halogen-free flame-retardants (HFFRs) have been developed, such as intumescent flame-retardants, organic phosphorus-containing flame-retardants, nitrogen-containing compounds, silicon-containing compounds, and some inorganic substances [12, 13].
- Which char-forming agent has the best synergistic flame retarding effect?
- It confirmed that the PON and EG the best synergistic flame retarding effect on PS among the five char-forming agents. The flame-retardant mechanism analyses demonstrated that the compounding of PON and EG promoted the formation of barrier protection layer and inhibited the rapid the thermal degradation of PS.
- Are halogen-free flame-retardants suitable for PS composites?
- This study provided a green and simple strategy for the preparation of environmentally friendly halogen-free flame-retardants suitable for PS, which was expected to expand the application scopes of PS composites.
