Formation of a Compact Protective Layer by Magnesium Hydroxide Incorporated with a Small Amount of Intumescent Flame Retardant: New Route to High Performance Nonhalogen Flame Retardant TPV

2014 ◽  
Vol 53 (21) ◽  
pp. 8784-8792 ◽  
Author(s):  
Kai Lu ◽  
Xiaojun Cao ◽  
Qiushi Liang ◽  
Hengti Wang ◽  
Xiaowen Cui ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
High Performance ◽  
Protective Layer ◽  
Intumescent Flame Retardant

scholarly journals Synergistic Flame Retardant Effect of an Intumescent Flame Retardant Containing Boron and Magnesium Hydroxide

ACS Omega ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 3314-3321 ◽  
Author(s):  
Lianghui Ai ◽  
Shanshan Chen ◽  
Jinming Zeng ◽  
Liu Yang ◽  
Ping Liu
Keyword(s):  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Intumescent Flame Retardant ◽  
Synergistic Flame Retardant

Intumescent flame retardant-derived P,N co-doped porous carbon as an efficient electrocatalyst for the oxygen reduction reaction

2015 ◽  
Vol 51 (79) ◽  
pp. 14801-14804 ◽  
Author(s):  
Yinling Wang ◽  
Xuemei Zhang ◽  
Anna Li ◽  
Maoguo Li
Keyword(s):  
Oxygen Reduction Reaction ◽  
Flame Retardant ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
High Performance ◽  
Reduction Reaction ◽  
Intumescent Flame Retardant ◽  
One Step ◽  
Co Doped

Intumescent flame retardant-derived P,N co-doped porous carbon was prepared by one-step pyrolysis, exhibiting high-performance for the oxygen reduction reaction.

scholarly journals Synthesis and application of nano-MH/MPB as intumescent flame retardant (IFR)

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Aiming Zhao ◽  
Yanmao Dong ◽  
Qiuyang Ni ◽  
Zhiyu Bao
Keyword(s):  
Flame Retardant ◽  
Optimal Condition ◽  
Magnesium Hydroxide ◽  
Flame Retardancy ◽  
Intumescent Flame Retardant ◽  
Mass Ratio ◽  
Reaction Method ◽  
Melamine Phosphate ◽  
Char Layer

Magnesium hydroxide/melamine phosphate borate (nano MH/MPB), a novel nano-composition intumescent flame retardant, was synthesized with the in-situ reaction method from MgCl2·6H2O sodium hydroxide (NaOH) and melamine phosphate borate (MPB) in the absence of H2O. The structure of the product was confirmed by EDAX IR and XRD. The effects of reaction temperature and time on the dimension of magnesium hydroxide were observed. The effects of mass ratio of magnesium hydroxide to MPB on the flame retardancy of nano-MH/MPB/EP were examined with the limiting oxygen test. The results show that the optimal condition of synthesis of MH/MPB is mMH/mMPB = 0.25, reacting under 75 ℃ for 30 minutes. Finally, the mechanism for flame retardancy of nano-MH/MPB/EP was pilot studied by means of IR of char layer and TG of MH/MPB.

Metal compounds as catalysts in the intumescent flame retardant system for polyethylene terephthalate fabrics

2018 ◽  
Vol 89 (15) ◽  
pp. 2983-2997 ◽  
Author(s):  
Yarong Wu ◽  
Xiang Zhou ◽  
Zhiqi Xing ◽  
Jiangtao Ma
Keyword(s):  
Flame Retardant ◽  
Polyethylene Terephthalate ◽  
Catalytic Effect ◽  
Degradation Products ◽  
Protective Layer ◽  
Intumescent Flame Retardant ◽  
Laser Raman Spectroscopy ◽  
Metal Compounds ◽  
Limiting Oxygen Index ◽  
Char Formation

Forming a carbonaceous protective layer during combustion has been proven to be an effective way to improving the flame retardancy of polymers and it has been found that some metal compounds could promote dehydrogenation and aromatization of the degradation products. In this research, several divalent or multivalent metal compounds were added in the intumescent flame retardant (IFR) based on ammonium polyphosphate, pentaerythritol and melamine for polyethylene terephthalate (PET) fabrics. The prepared flame retardant dispersions containing 25 wt% IFR and 1 wt% metal compounds were applied on PET fabrics by the common pad-dry-cure method. None of the treated samples generated any dripping during the vertical burning test, with the highest limiting oxygen index being up to 33.4%. Thermogravimetric analysis showed that the catalytic effect of metal compounds may occur in promoting the formation of char residues. The morphology of char residues of two of the IFR/metal compound-treated PET fabrics, IFR/FeCl3 and IFR/ZnCl2, were smooth and compact, as shown by scanning electron microscopy. Laser Raman spectroscopy of the char residues suggested that a higher graphitization degree was obtained by adding the metal compounds. Real-time Fourier transform infrared spectroscopy showed that metal compounds made more phosphorus available for phosphorylation and char formation. The results of the present study indicate the possibility for enhancing char formation via the catalytic effect of metal compounds to improve the flame retardant and anti-dripping properties of the PET fabrics.

scholarly journals Halogen-Free Flame Retardant Polypropylene Fibers with Modified Intumescent Flame Retardant: Preparation, Characterization, Properties and Mode of Action

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2553
Author(s):  
Qibin Xu ◽  
Lei Wu ◽  
Xiang Yan ◽  
Shengchang Zhang ◽  
Linan Dong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Release ◽  
Flame Retardant ◽  
Protective Layer ◽  
Intumescent Flame Retardant ◽  
X Ray Diffraction ◽  
Limiting Oxygen Index ◽  
Action Mode ◽  
Combustible Gases ◽  
Halogen Free

A novel intumescent flame retardant (IFR) agent designated as Dohor-6000A has been used to prepare halogen-free flame retardant polypropylene (PP) fibers via melting spinning. Before being blended with PP resin, a surface modification of Dohor-6000A was carried out to improve its compatibility with the PP matrix. The rheological behavior of flame retardant Dohor-6000A/PP resin, the structure, morphology, mechanical properties, flammability of the Dohor-6000A/PP fibers were studied in detail, as well as the action mode of flame retardant. X-ray diffraction (XRD) showed that the addition of Dohor-6000A did not damage the crystal as well as the orientation structure of PP matrix, which was helpful to the maintenance of mechanical properties. The presence of the IFR significantly improved the flame retardant performance and thermal stability of PP fibers. When the content of Dohor-6000A reached 25%, the fibers displayed a limiting oxygen index (LOI) value of 29.1% and good melt-drop resistance. Moreover, the peak heat release rate (PHRR) and total heat release (THR) from microscale combustion colorimetry (MCC) tests were decreased by 26.0% and 16.0% in comparison with the same conditions for pure PP fibers. In the condensed phase, the IFR promoted a carbonization process and promoted the formation of a glassy or stable foam protective layer on the surface of the polymer matrix. In addition, the IFR decomposed endothermically to release of non-combustible gases such as NH3 and CO2 which dilutes the combustible gases in the combustion zone.

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.

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