High performance flame-retardant organic–inorganic hybrid epoxy
In recent years, as a substitute for halogen flame retardants, DOPO and its derivatives have exhibited remarkable achievements for halogen-free flame-retarded epoxy resin. 6–10 However, the weak bond of phosphorus-containing groups that introduced into the epoxy matrix reduces the crosslinking density and consequently brings negative effects on thermal and mechanical properties of cured
Superior flame retardancy of glass fiber-reinforced
How to create high-performance flame-retardant semi-aromatic polyamide with minimum flame retardant loading remain a major challenge. Herein, glass fiber-reinforced polyamide 6T (GFPA6T) composites with superior flame retardancy were obtained by synergism between DOPO-based derivative (PN-DOPO) and carbon nanotube (CNT). The introduction of 9 mass% PN-DOPO and 1 mass% CNT into GFPA6T, which is
Highly efficient phosphorous-containing flame retardant
In addition, when BDEMPP was added to EP, the mechanical properties of the prepared flame-retardant material increased. Therefore, using piperazine to prepare high-efficiency flame retardants is a promising way, and it can be predicted that DOPO-piperazine-derived salt could be a high-performance flame retardant for EP.
Efficient Flame Retardant Thin Films Synthesized by Atmospheric
An innovative approach to produce high-performance and halogen-free flame-retardant thin films at atmospheric pressure is reported. PDMS-based coatings with embedded dopant-rich polyphosphates are elaborated thanks to a straightforward approach, using an atmospheric pressure dielectric barrier discharge (AP-DBD). Deposition conditions have been tailored to elaborate various thin films that can
Efficient flame retardancy, good thermal stability, mechanical
It is of great significance to develop high-performance epoxy resins (EPs) combining superior flame retardancy, smoke suppression, thermal oxidation stability, transparency and mechanical properties. However, current flame retardant design strategy usually realizes satisfied flame retardancy at the expense of other properties.
- Which flame retardant reduces PHRR and the?
- Both flame retardants reduced the PHRR and THE in the order RTM6-CF > RTM6-CF + DOPP = RTM6-CF + DOPI, indicating a flame-retarding action in the composites as well. The residue of RTM6 + DOPP and RTM6 + DOPI was increased in comparison to that of RTM6. This led to the shoulder in the HRR curve of RTM6 + DOPP and RTM6 + DOPI.
- Why is Dopo a flame retardant?
- Thus 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) has become one of the most important flame retardants in this field, now used in several modifications as a reactive or additive compound , , , , , , , . DOPO shows excellent flame-retarding properties in epoxy-based materials.
- Does flame retardant improve Loi of rtm6?
- The LOI of RTM6 with flame retardant was improved by around 12% for RTM + DOPP and by 9% for RTM6 + DOPI. The flame-retarded composites showed an amelioration of the LOI of +12% for RTM6-CF + DOPP and + 14% for RTM6-CF + DOPI in comparison to RTM6-CF.
- Are oligomeric star-shaped flame retardants suitable for rtm6 and rtm6-cf?
- Oligomeric star-shaped flame retardants containing DOPO (DOPP and DOPI) were proposed for RTM6 and RTM6-CF. The glass transition temperatures of all materials and the mechanical properties, such as apparent ILSS and the critical strain energy release rate ( GIc, GIIc) were determined for the composites. Pyrolysis and fire behaviour were studied.
- Are phosphorus flame retardants halogen-free?
- Flame retardants containing phosphorus seem to offer a promising halogen-free way to render epoxy resins and their composites flame retardant in the future , .
- Why do flame retardants have a higher flame inhibition than non-flame-retarded material?
- The lower the THE/ML in comparison to the non-flame-retarded material, the stronger the flame inhibition of the flame retardant. Furthermore flame inhibition goes along with incomplete combustion, which increases the smoke and the CO release in the gas phase.
