Study on the Flame Retardant Property of Magnesium Hydroxide Whiskers/PE Composites

2012 ◽  
Vol 454 ◽  
pp. 93-96
Author(s):  
Yu Zhi Jiang ◽  
Li Li Zhang ◽  
Zhong Yang Zhang
Keyword(s):  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Flame Retardant Property

Study on the Flame Retardant Property of Magnesium Hydroxide Whiskers/PE Composites

2012 ◽  
Vol 454 ◽  
pp. 93-96 ◽  
Author(s):  
Yu Zhi Jiang ◽  
Li Li Zhang ◽  
Zhong Yang Zhang
Keyword(s):  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Interfacial Energy ◽  
Organic Molecule ◽  
Oxygen Index ◽  
Melt Extrusion ◽  
Flame Retardant Property ◽  
Better Than

The magnesium hydroxide (MH) whisker/PE composites were prepared by melt-extrusion with modified whiskers and unmodified whiskers as fillers respectively. The flame retardant property of composites was tested by the oxygen index machine. The magnesium hydroxide whiskers could improve the flame retardant property of the composites. When the contents of the modified and unmodified whiskers increased from 10% to 60%, the oxygen index of the composites increased from 24.4% to 43.4%, 23.2% to 40.2% respectively. The flame retardant of the modified whiskers/PE composites was better than the unmodified. The morphology of fracture was analyzed by SEM: the modified whisker could be more evenly divided into PE matrix with better dispersibility and compatibility, for that there occurred organic molecule membranes on the surface of the crystal whiskers after being modified, which lowered the interfacial energy of whiskers.

Flammability, morphological and mechanical properties of sugar palm fiber/polyester yarn-reinforced epoxy hybrid biocomposites with magnesium hydroxide flame retardant filler

2021 ◽  
pp. 004051752110086
Author(s):  
MJ Suriani ◽  
SM Sapuan ◽  
CM Ruzaidi ◽  
DS Nair ◽  
RA Ilyas
Keyword(s):  
Tensile Strength ◽  
Surface Morphology ◽  
Flame Retardant ◽  
Tensile Properties ◽  
Magnesium Hydroxide ◽  
Building Materials ◽  
Epoxy Composite ◽  
Sem Analysis ◽  
Palm Fiber ◽  
Sugar Palm Fiber

This paper aims to study the surface morphology, flammability and tensile properties of sugar palm fiber (SPF) hybrid with polyester (PET) yarn-reinforced epoxy composite with the addition of magnesium hydroxide (Mg(OH)2) as a flame retardant. The composites were prepared by hybridized epoxy and Mg(OH)2/PET with different amounts of SPF contents (0%, 20%, 35% and 50%) using the cold press method. Then these composites were tested by horizontal burning analysis, tensile strength testing and scanning electron microscopy (SEM) analysis. The specimen with 35% SPF (Epoxy/PET/SPF-35) with the incorporation of Mg(OH)2 as a flame retardant showed the lowest burning rate of 13.25 mm/min. The flame took a longer time to propagate along with the Epoxy/PET/SPF-35 specimen and at the same time producing char. Epoxy/PET/SPF-35 also had the highest tensile strength of 9.69 MPa. Tensile properties of the SPF hybrid with PET yarn (SPF/PET)-reinforced epoxy composite was decreased at 50% SPF content due to the lack of interfacial bonding between the fibers and matrix. Surface morphology analysis through SEM showed uniform distribution of the SPF and matrix with less adhesion, which increased the flammability and reduced the tensile properties of the hybrid polymeric composites. These composites have potential to be utilized in various applications, such as automotive components, building materials and in the aerospace industry.

Flame Retardant Polyamide 6 Composites Using NMH or NMH/MCA/APP

2011 ◽  
Vol 189-193 ◽  
pp. 1208-1211 ◽  
Author(s):  
Yan Shen ◽  
Shao Guo Wen ◽  
Ji Hu Wang ◽  
Hong Bo Liu ◽  
Hai Liang Qi ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Flame Retardants ◽  
Polyamide 6 ◽  
X Ray Diffraction ◽  
Upward Trend ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Orthogonal Experiments ◽  
Nitrogen Phosphorus

In this paper, flame retardant Polyamide 6 (PA6) composites were prepared by nano-magnesium hydroxide (NMH) or its composites with melamine cyanurate(MCA) and ammonium polyphosphate(APP). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to analyze the structure of nano-magnesium hydroxide. The properties including tensile properties, molten index (MFI), rockwell hardness and density of flame retardant PA6 were analyzed. Orthogonal experiments were used to study flame retardancy of PA6 with NMH, MCA and APP. The results showed NMH had hexagonal orthorhombic crystal structure with size of 300×200×100nm. Density of polyamide 6 showed an upward trend when the content of NMH was increasing, the mechanical properties and hardness changed little while processing performance serious declined. The flame retardance of nitrogen-phosphorus -inorganic flame retardants was not desirable.

scholarly journals Synergistic Flame-Retardant Mechanism of Dicyclohexenyl Aluminum Hypophosphite and Nano-Silica

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1211 ◽  
Author(s):  
Heng Zhang ◽  
Junliang Lu ◽  
Hongyan Yang ◽  
Heng Yang ◽  
Jinyan Lang ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Combustion Surface ◽  
Carbon Layer ◽  
Material Surface ◽  
Infrared Analysis ◽  
Index Test ◽  
Nano Silica ◽  
Cone Calorimetry ◽  
Flame Retardant Property ◽  
Aluminum Hypophosphite

The flame retardant dicyclohexenyl aluminum hypophosphite (ADCP) and nano-silica are added to PA66 to improve flame retardant property of the composite. The flame-retardant property of the composite is tested via oxygen index test, vertical burning test, and cone calorimetry test. Combustion residues are tested using scanning electron microscopy, EDS spectroscopy, and Fourier infrared analysis. Results show that flame-retardant ADCP can effectively promote the formation of a porous carbon layer on the combustion surface of PA66. Nano-silica easily migrates to the material surface to improve the oxidation resistance of the carbon layer and the density of the carbon layer’s structure. It can also effectively prevent heat, flammable gases, and oxygen from entering the flame zone and enhance the flame retardant properties of ADCP.

Preparing and Applying of Flame Retardant Microcapsules Containing Magnesium Hydroxide

2013 ◽  
Vol 734-737 ◽  
pp. 2191-2194
Author(s):  
Li Li Wu ◽  
Yuan Lian ◽  
Dan Liu ◽  
Hua Zheng ◽  
Dian Wu Huang
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Low Density Polyethylene ◽  
Core Shell ◽  
Low Density ◽  
Melamine Resin ◽  
Shell Material ◽  
Elongation At Break ◽  
Good Thermal Stability

In this study, flame retardant microcapsules were synthesized using magnesium hydroxide as core materials, melamine resin as the shell material. The structure, diameters and thermal properties of prepared microcapsules were investigated by using FTIR, ELS, DSC and TGA. The effects of core/shell ratio on the properties of microcapsules were studied.Flame retardant materials of low-density polyethylene/magnesium hydroxide microcapsules were prepared.The tensile strength and elongation at break tests were performed to determine its mechanical property.Inflammability of the materials was also studied.The results showed the prepared magnesium hydroxide microcapsule shows good thermal stability and it has free compatibility with the polymer.The composites of HDPE/MH microcapsules have good performance．

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