Flame Retardant Low Density Polyethylene with Aluminium Hydroxide/ Commercial Fire Retardants FR01 Synergistic System

2013 ◽  
Vol 652-654 ◽  
pp. 485-489 ◽  
Author(s):  
Ni Na Wang ◽  
Ding Han Xiang ◽  
Pin Shu Mo ◽  
Yi Lu
Keyword(s):  
Flame Retardancy ◽  
Aluminium Hydroxide ◽  
Volume Resistivity ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Fire Retardants ◽  
Screw Extruder ◽  
Limiting Oxygen Index ◽  
Twin Screw ◽  
Ldpe Composites

Low density polyethylene (LDPE) was modified by the addition of commercial fire retardants FR01 and aluminium hydroxide (ATH). ATH/FR01/LDPE composites were prepared by melt blending and extrusion in a twin-screw extruder. ATH was first modified by a silane coupling agent KH550 then added to LDPE. The flame retardancy, electrical property and thermal behavior of the LDPE composites were investigated by limiting oxygen index (LOI), volume resistivity and thermogravimetric analysis (TGA), respectively. The results indicated that the surface modification of ATH (M-ATH) could greatly improve the dispersibility and compatibility with LDPE matrix. The mechanical property tests showed good mechanical properties of composite, compared with unmodified one, tensile strength and elongation of M-ATH/LDPE were all improved, and the addition of FR01 improved the flame retardancy of ATH/LDPE remarkably. TGA results demonstrate that char yield of M-ATH/FR01/LDPE (30/15/70) reaches 27 wt% at 600 °C in Ar atmosphere.

Characterization and determination of thermal and radioluminescence properties of low-density polyethylene (LDPE)-(nanozeolite + Y2O3) composite

2019 ◽  
Vol 28 (2) ◽  
pp. 112-118
Author(s):  
Murat Çanlı ◽  
İlker Çetin Keskin ◽  
Murat Türemiş ◽  
Kamil Sirin ◽  
Mehmet İsmail Katı
Keyword(s):  
Low Density Polyethylene ◽  
Low Density ◽  
X Ray Diffraction ◽  
Twin Screw ◽  
Nanocomposite Fibers ◽  
To Come ◽  
Ldpe Composites ◽  
Dispersing Medium ◽  
Extrusion Method

Nanotechnology has become one of the most popular areas of interdisciplinary research. In the vast majority of nanotechnology applications, polymer-based matrices were used as the dispersing medium of nanoparticles. The combination of polymer–zeolite nanocomposite has the potential to come out with the advantages of polymers and zeolites while coping with the deficiencies of both materials. In this study, the synthesis and properties of low-density polyethylene (LDPE) composites with nanozeolite + Y2O3 are investigated. Polyethylene nanocomposite fibers containing nanozeolite + Y2O3 at 5% by mass using a melt extrusion method were composed in a laboratory type twin screw extruder. The thermal properties of the composite fibers were determined by analysis of both thermal gravimetric and differential thermal spectra. Their structural properties were enlightened by scanning electron microscopy, Fourier transform infrared, and ultraviolet absorption. According to the results of X-ray diffraction tests, the samples contain crystals in semicrystalline and α form. The mechanical properties of LDPE matrices increased with the addition of nanoparticles. In addition, radioluminescence properties of the polymer were also improved after composing with nanozeolite and Y2O3.

Characterization of Linear Low Density Polyethylene/Rambutan Peels Flour Blends: Effect of Loading Content

2016 ◽  
Vol 673 ◽  
pp. 171-179 ◽  
Author(s):  
A. Ainatun Nadhirah ◽  
S.T. Sam ◽  
N.Z. Noriman ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Mohd Firdaus Omar ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Testing Machine ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Screw Extruder ◽  
Twin Screw ◽  
Flour Blends

The effect of rambutan peels flour (RPF) content on the tensile properties of linear low density polyethylene filled with rambutan peel flour was studied. RPF was melt blended with linear low–density polyethylene (LLDPE). LLDPE/RPF blends were prepared by using twin screw extruder at 150°C with the flour content ranged from 0 to 25 wt%. The tensile properties were tested by using a universal testing machine (UTM) according to ASTM D638. The highest tensile strength was pure LLDPE meanwhile the tensile strength LLDPE/RPF decreased gradually with the addition of rambutan peels flour. Young’s modulus of rambutan peels flour filled LLDPE increased with increasing fiber loading. The crystallinity of the blends was significantly reduced with increasing RPF content. Instead, the water absorption increased with the addition of RPF content.

scholarly journals MgO-Lignin Dual Phase Filler as an Effective Modifier of Polyethylene Film Properties

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 809 ◽  
Author(s):  
Karol Bula ◽  
Grzegorz Kubicki ◽  
Teofil Jesionowski ◽  
Łukasz Klapiszewski
Keyword(s):  
Lignin Content ◽  
Mechanical Tests ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Screw Extruder ◽  
Hybrid Filler ◽  
Tear Strength ◽  
Twin Screw ◽  
Time Required ◽  
Almost All

Functional magnesium oxide-lignin hybrid materials were obtained via mechanical grinding. Their particle shape and size as well as physicochemical properties were characterized. MgO-lignin materials with biocomponent content (between 20% and 80% amount of total weight of filler) were used as a partially bio-structured modifier of low density polyethylene. The composites with 5% by weight of dual fillers and polyethylene grafted with maleic anhydride were compounded in a twin screw extruder working in co-rotating mode. The prepared blends were cast extruded using a single screw extruder and laboratory cast line. The properties of the obtained films were verified in case of their weldability. The seal strength as well as shear test and tear strength of the welded sheets were examined. The results showed that the shortest equivalent time required to perform correct weld occurred in the system, where the highest amount of lignin was used in hybrid filler MgO-L (1:5 w/w). From mechanical tests of welds, a sharp increase in ultimate seal force was noticed for almost all compositions with lignin, especially where MgO was coupled with a high lignin content. For those composition seal open force raised up to 37.0 N, from the value of 23.6 N, achieved for neat low density polyethylene (LDPE). Tear strength of weld sheets confirmed once more that LDPE composition with MgO-L (1:5 w/w) achieved the highest ultimate force with its value of 71.5 N, and it was ~20.0 N higher than in the case of neat LDPE.

Effect of Sepiolite Content on Mechanical and Flammability Properties of Ethylene Vinyl Acetate Nanocomposite

2014 ◽  
Vol 970 ◽  
pp. 259-262
Author(s):  
Hossein Cheraghi Bidsorkhi ◽  
Zurina Mohamad
Keyword(s):  
Mechanical Properties ◽  
Injection Molding ◽  
Tensile Test ◽  
Vinyl Acetate ◽  
Flame Retardancy ◽  
Oxygen Index ◽  
Ethylene Vinyl Acetate ◽  
Screw Extruder ◽  
Limiting Oxygen Index ◽  
Twin Screw

Ethylene Vinyl Acetate (EVA)/Sepiolite nanocomposites were prepared by melt extrusion using a counter-rotating twin-screw extruder followed by injection molding. Sepiolite was loaded in EVA is varies at 1, 3, 5 and 7 wt%. The mechanical properties of EVA/Sepiolite nanocomposites were studied through tensile test. The flame retardancy of nanocomposites were studied for limiting oxygen index (LOI). LOI tests show that the flame retardancy of nanocomposites were increased with increase ratio of sepiolite in EVA/Sepiolite nanocomposite. The tensile properties of EVA/Sepiolite nanocomposites were also increased with increased Sepiolite content in nanocomposites.

Rheological Behavior and Microstructure of Flame Retardant Polypropylene Composites

2010 ◽  
Author(s):  
Guo Jiang ◽  
Kai Liao ◽  
Juan-Juan Han ◽  
De-Xian Feng ◽  
Han-Xiong Huang
Keyword(s):  
Magnesium Hydroxide ◽  
Shear Viscosity ◽  
Flame Retardancy ◽  
Rheological Behavior ◽  
Oxygen Index ◽  
Complex Viscosity ◽  
Test Results ◽  
Screw Extruder ◽  
Polypropylene Composites ◽  
Twin Screw

Polypropylene (PP)/magnesium hydroxide (MDH) composite was melt-mixed using a twin-screw extruder. Two types of MDH were used, one with the modification of silane and another without. The rheological behavior was measured by capillary and dynamical rheometer. Microstructure of these composites was observed by SEM. Their flame retardancy was characterized by oxygen index and Horizontal/Vertical burning test. Results showed that shear viscosity and complex viscosity of PP with modified MDH were lower than that of PP with non-modified MDH. SEM results also showed a better dispersion of silane modified MDH in PP matrix. With the increase of MDH content, the oxygen index of composites was increased. When the content was increased to 60 wt%, the composite was UL94 HB and V-1.

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