Synthesize and Characterization of Flame Retardant Copolyesters PET/Phosphorus Compound

2018 ◽  
Vol 25 (3) ◽  
pp. 262-270
Author(s):  
Atiyeh Abbasi ◽  
Alireza Shakeri ◽  
Alireza Abbasi
Keyword(s):  
Flame Retardant ◽  
Phosphorus Compound

Preparation and Characterization of Soybean Oil-based Flame Retardant Rigid Polyurethane Foams Containing Phosphaphenanthrene Groups

2020 ◽  
Vol 17 (10) ◽  
pp. 760-771
Author(s):  
Qirui Gong ◽  
Niangui Wang ◽  
Kaibo Zhang ◽  
Shizhao Huang ◽  
Yuhan Wang
Keyword(s):  
Soybean Oil ◽  
Flame Retardant ◽  
Chemical Structure ◽  
Cell Structure ◽  
Polyurethane Foams ◽  
Limiting Oxygen Index ◽  
Rigid Polyurethane Foams ◽  
Degradation Activation Energy ◽  
Ft Ir

A phosphaphenanthrene groups containing soybean oil based polyol (DSBP) was synthesized by epoxidized soybean oil (ESO) and 9,10-dihydro-oxa-10-phosphaphenanthrene-10-oxide (DOPO). Soybean oil based polyol (HSBP) was synthesized by ESO and H2O. The chemical structure of DSBP and HSBP were characterized with FT-IR and 1H NMR. The corresponding rigid polyurethane foams (RPUFs) were prepared by mixing DSBP with HSBP. The results revealed apparent density and compression strength of RPUFs decreased with increasing the DSBP content. The cell structure of RPUFs was examined by scanning electron microscope (SEM) which displayed the cells as spherical or polyhedral. The thermal degradation and flame retardancy of RPUFs were investigated by thermogravimetric analysis, limiting oxygen index (LOI), and UL 94 vertical burning test. The degradation activation energy (Ea) of first degradation stage reduced from 80.05 kJ/mol to 37.84 kJ/mol with 80 wt% DSBP. The RUPF with 80 wt% DSBP achieved UL94 V-0 rating and LOI 28.3. The results showed that the flame retardant effect was mainly in both gas phase and condensed phase.

Synthesis and characterization of flame-retardant-wrapped carbon nanotubes and its flame retardancy in epoxy nanocomposites

2021 ◽  
pp. 096739112110245
Author(s):  
Jiangbo Wang
Keyword(s):  
Carbon Nanotubes ◽  
Heat Release ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Total Heat Release ◽  
Pristine Cnts ◽  
Peak Heat Release Rate ◽  
Ep Matrix ◽  
Better Than

A novel phosphorus-silicon containing flame-retardant DOPO-V-PA was used to wrap carbon nanotubes (CNTs). The results of FTIR, XPS, TEM and TGA measurements exhibited that DOPO-V-PA has been successfully grafted onto the surfaces of CNTs, and the CNTs-DOPO-V-PA was obtained. The CNTs-DOPO-V-PA was subsequently incorporated into epoxy resin (EP) for improving the flame retardancy and dispersion. Compared with pure EP, the addition of 2 wt% CNTs-DOPO-V-PA into the EP matrix could achieve better flame retardancy of EP nanocomposites, such as a 30.5% reduction in peak heat release rate (PHRR) and 8.1% reduction in total heat release (THR). Furthermore, DMTA results clearly indicated that the dispersion for CNTs-DOPO-V-PA in EP matrix was better than pristine CNTs.

scholarly journals Preparation and characterization of polydopamine/melamine microencapsulated red phosphorus and its flame retardance in epoxy resin

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20391-20402
Author(s):  
Chen Cheng ◽  
Yanling Lu ◽  
Weining Ma ◽  
Shaojie Li ◽  
Jun Yan ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Epoxy Resin ◽  
Shell Structure ◽  
Composite Shell ◽  
Intumescent Flame Retardant ◽  
Smoke Suppression ◽  
Flame Retardance ◽  
Red Phosphorus ◽  
Composite Shell Structure

Red phosphorus was coated by a polydopamine/melamine composite shell structure, which constituted an intumescent flame retardant with superior flame retardance and smoke suppression performance for epoxy resin.

scholarly journals Synthesis and characterization of PEDMCD as a flame retardant and its application in epoxy resins

RSC Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 2756-2766
Author(s):  
Yi Zhang ◽  
Weiwei Yang
Keyword(s):  
Flame Retardant ◽  
Epoxy Resins ◽  
Synthesis And Characterization ◽  
Direct Polycondensation ◽  
Polycondensation Reaction ◽  
Highly Effective

In this study, a highly effective flame retardant agent, called polybicyclopentaerythritol phosphate-O-4-imino-p-phenylmethane-4-imino-2-chloro-1,3,5-s-triazine (PEDMCD), has been prepared through a direct polycondensation reaction.

Preparation and characterization of solution spinning of protein/cellulose fiber: A new flame-retardant grade

2016 ◽  
Vol 47 (2) ◽  
pp. 233-251 ◽  
Author(s):  
Zhou Zhao ◽  
Weiren Bao ◽  
Youbo Di ◽  
Jinming Dai
Keyword(s):  
Flame Retardant ◽  
Cellulose Fiber ◽  
Decomposition Temperature ◽  
Major Product ◽  
Viscose Fiber ◽  
Compact Structure ◽  
Before And After ◽  
Solution Spinning ◽  
Warmth Retention

A new flame-retardant protein viscose fiber with safely wearing performance has been prepared through blending protein solution, flame retardant (hexaphenoxycyclotriphosphazene) and viscose spinning solution, in which wool protein was used and added to spinning solution on the basis of 16% flame retardant, and the properties of the fiber were investigated. The product has more compact structure inside the fiber and evenly scattered small pores on the surface. Flame-retardant protein viscose fiber can reach the flame-retardant standard both before and after 30 times wash test, and the mechanical strength of the fiber was also improved. The introduction of hexaphenoxycyclotriphosphazene lowered the primary decomposition temperature of viscose fiber, reduced its weight loss. The flame-retardancy of the fiber can be improved by the introduction of protein. In thermal processes, the major product of thermal decomposition was CO2, no hazardous and noxious gases were released. Due to the introduction of protein, moisture regain of the fiber is a little lower than that of viscose fiber, but higher than flame-retardant viscose fiber. Warmth retention property was also improved. Friction coefficient of the product is lower than that of flame-retardant viscose fiber. Bulking intensity was increased, which is better than that of viscose fiber.

Synthesis and characterization of magnetic nanoparticles/dialdehyde cellulose composite as a flame retardant

2018 ◽  
Vol 6 (2) ◽  
pp. 025312 ◽  
Author(s):  
Sherif M A S Keshk ◽  
Adel A El-Zahhar ◽  
Abdullah G Al-Sehemi ◽  
Ahmad Irfan ◽  
Samir Bondock
Keyword(s):  
Magnetic Nanoparticles ◽  
Flame Retardant ◽  
Synthesis And Characterization ◽  
Dialdehyde Cellulose ◽  
Cellulose Composite

Preparation and Characterization of a Novel Flame Retardant

2008 ◽  
Vol 47-50 ◽  
pp. 294-297 ◽  
Author(s):  
Xiu Wei Jia ◽  
Min Zhi Rong ◽  
Ming Qiu Zhang
Keyword(s):  
Flame Retardant ◽  
Sol Gel ◽  
Average Molecular Weight ◽  
Regular Structure ◽  
Gel Permeation Chromatography ◽  
Helical Conformation ◽  
Infrared Spectrometry ◽  
Resonance Spectroscopy ◽  
X Ray Diffraction

A novel flame retardant polymethylsilsesquioxane (PMSQ) was successfully obtained via combination of non-hydrolytic and hydrolytic sol-gel routes. Chemical structure of the resultant PMSQ was determined by nuclear magnetic resonance spectroscopy, Fourier-transform infrared spectrometry and powder X-ray diffraction, respectively. All the measurements demonstrated that the product possessed regular structure with chain-to-chain width of 0.87nm and chain thickness of 0.40nm. Weight average molecular weight of PMSQ was measured to be 3.5×105 using gel permeation chromatography. Numerical simulations of the molecular structure suggested that PMSQ should exhibit cis-isotactic configuration and double helical conformation at undisturbed condition.

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