Effect of Different Flame-Retardant Bridged DOPO Derivatives
Effect of Different Flame-Retardant Bridged DOPO Derivatives on Properties of in Situ Produced Fiber-Forming Polyamide 6 Effect of Different Flame-Retardant Bridged DOPO Derivatives on Properties of in Situ Produced Fiber-Forming Polyamide 6 Authors
Effect of Different Flame-Retardant Bridged DOPO Derivatives
The selected bridged DOPO derivatives mainly act in the gas phase at the temperatures that relatively match the PA6 pyrolysis specifics. The effects of the FRs on the dispersion state, morphological, molecular, structural, melt-rheological, and thermal properties of the in situ synthesized PA6 were evaluated.
Effect of Different Flame-Retardant Bridged DOPO Derivatives
This research work explores the influence of three different flame-retardant bridged 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivatives on the comprehensive properties of in
Flame-retardant effect of a phenethyl-bridged DOPO derivative
In addition, Buczko et al.18 have proposed that DOPO derivatives mainly play a role in the flame-retardant mechanism of gas-phase inhibition and increased the melt-flow drip. Therefore, the data in LOI and UL-94 tests of EP/DiDOPO are correlated to the gas-phase flame inhibition mechanism.
Structural and flame retardancy properties of GO-DOPO-HAK
Abstract In the view of the advantages of using P, N, Si and graphene oxide (GO) for the development of flame retardants materials, a multi-structure synergistic composite was synthesized by grafting a novel nitrogen-containing polyhedral oligomeric silsesquioxane (HAK) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) on the surface of GO nanosheet. In the first step, 2
- Are bridged Dopo derivatives flame retardant?
- Aleksandra Buczko et al. investigated the flame retardant effects of bridged DOPO derivatives on polyamide 6 (PA6). Their results showed that bridged DOPO derivatives are good components for flame retardant PA6.
- How do bridged Dopo derivatives affect the thermal stability of PLA?
- However, as comparison to that of pure PLA (322.5 °C), the T -5% of PLA/DiDOPO1, PLA/DiDOPO2, and PLA/DiDOPO3 increases by 16.1 °C, 10.2 °C, and 30.9 °C, respectively. Thus, the thermal stabilities of PLA are significantly enhanced by the addition of bridged DOPO derivatives.
- Do bridged Dopo derivatives enhance the thermal stability of polymer nanocomposites?
- Thus, the thermal stabilities of PLA are significantly enhanced by the addition of bridged DOPO derivatives. Fina et al. summarized that the enhanced the thermal stability of polymer nanocomposites with layered silicate was caused by barrier, cage and physical effects.
- Why do flame retardants have a high FR loading?
- However, the strong inter- and intra-molecular attractive interactions between polymer chains inhibit obtaining the highly dispersed and uniformly distributed state of flame retardants in the PA6 matrix. Consequently, theeffectiveness of the incorporated flame retardants is decreased, which imposes the inevitable use of high FR loading.
- How efficient is flame retardant scavenger compared to a polymer?
- The efficiency of the latter is closely related to the temperature at which flame-retardant volatile radical scavengers are produced, i.e., the premature as well as delayed decomposition of the gas phase flame retardant in comparison to that of the polymer providesinefficient inhibition of the flaming combustion process [ 8 ].
- Do bis Dopo derivatives reduce fire hazard?
- In addition, the maximum average rate of heat emission (MAHRE) of PLA composites evidently decrease. Therefore, the decreases in PHRR, THR and MAHRE of PLA composites indicate that the addition of bis DOPO derivatives reduces fire hazard. Fig. 7.
