scholarly journals Ultra high molecular weight polyethylene doped with iron through high energy mechanical alloying

2020 ◽  
Vol 25 (3) ◽  
Author(s):  
José Flávio Marcelino Borges ◽  
Michele Mugnaine ◽  
Alexandre Camilo Junior ◽  
Fabiana Cristina Nascimento Borges ◽  
Osvaldo Mitsuyuki Cintho
Keyword(s):  
Molecular Weight ◽  
Mechanical Alloying ◽  
High Molecular Weight ◽  
High Energy ◽  
Ultra High Molecular Weight

Fabrication of Kevlar®-reinforced ultra-high molecular weight polyethylene composite through microwave-assisted compression molding for body armor applications

2020 ◽  
pp. 073168442095944
Author(s):  
Taresh Guleria ◽  
Nishant Verma ◽  
Sunny Zafar ◽  
Vivek Jain
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Energy Absorption ◽  
Compression Molding ◽  
High Energy ◽  
Impact Testing ◽  
Uniaxial Tensile ◽  
Microwave Assisted ◽  
Uniaxial Tensile Testing ◽  
Ultra High Molecular Weight

Kevlar®-reinforced composites are used in high energy absorption applications. In the present work, Kevlar®-reinforced ultra-high molecular weight polyethylene composites were fabricated through microwave-assisted compression molding. The microwave-assisted compression molding parameters were optimized through trial and error method. Analysis of mechanical behavior of composites was accessed through uniaxial tensile testing, flexural testing, impact testing, and nano-indentation. The fractured specimens were observed using scanning electron microscopy. An increment of 92.2% was observed in the ultimate tensile strength of the ultra-high molecular weight polyethylene/Kevlar® composite compared to neat ultra-high molecular weight polyethylene. Flexural properties, impact energy absorption rate, and hardness property of the composite were increased by 27.1%, 91.6%, and 4.77%, respectively, compared to pure ultra-high molecular weight polyethylene. Enhanced mechanical properties may be attributed to unique microwave heating phenomena during microwave-assisted compression molding.

Ultra-high Molecular Weight Polyethylene /Graphite Nanocomposites Prepared by High-energy Cryomilling.

2013 ◽  
Vol 1453 ◽  
Author(s):  
Sofía Vazquez-Rodriguez ◽  
Gloria E. Rodríguez-Vázquez ◽  
Selene Sepulveda-Guzman ◽  
Martín E. Reyes-Melo ◽  
Aaron Morelos-Gomez ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Mechanical Performance ◽  
Thermal Characterization ◽  
High Energy ◽  
Graphite Nanoplatelets ◽  
Scanning Calorimetry ◽  
Ultra High Molecular Weight ◽  
Graphite Nanocomposites

ABSTRACTUltra-high molecular weight polyethylene/graphite nanocomposites were prepared by high-energy cryogenic milling followed by syntering. Microstructure changes shows that graphite was reduced to graphite nanoplatelets by high-energy cryomilling and partial exfoliation of graphite to few layered graphene nanoplatelets occurred in a small extent. The resulting nanocomposites revealed high electrical conductivity and good mechanical performance. Thermal characterization of the nanocomposites was also carried out by differential scanning calorimetry.

scholarly journals Study of resistance of ultra-high molecular weight polyethylene to mechanochemical and radiation exposure

2021 ◽  
Vol 340 ◽  
pp. 01007
Author(s):  
Kamila M. Khassenova ◽  
Sergey V. Vosmerikov
Keyword(s):  
Molecular Weight ◽  
Radiation Exposure ◽  
Mechanical Activation ◽  
High Molecular Weight ◽  
High Energy ◽  
Polymer Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Crystallography ◽  
Ultra High Molecular Weight

Ultra-high molecular weight polyethylene is a promising composite material to protect against ionizing radiation. The effect of mechanical activation and radiation exposure on the polymer structure has been studied. Mechanical activation of ultra-high molecular weight polyethylene was carried out for 30 s, 1, and 2 min in a high-energy water-cooled planetary ball mill AGO-2, followed by its further investigation using X-ray diffraction, X-ray crystallography, IR spectroscopy, scanning electron microscopy, and differentialscanning calorimetry.

Preparation of UHMWPE/MMT Nanocomposites via Mechanical Alloying

2012 ◽  
Vol 727-728 ◽  
pp. 1775-1779 ◽  
Author(s):  
Carlos Alberto Silva de Lima ◽  
Osvaldo Mitsuyuki Cintho ◽  
Benjamim de Melo Carvalho
Keyword(s):  
Molecular Weight ◽  
Solid State ◽  
Injection Molding ◽  
Mechanical Alloying ◽  
Impact Resistance ◽  
High Viscosity ◽  
High Energy ◽  
The Matrix ◽  
Ultra High Molecular Weight ◽  
Very High

The ultra high molecular weight polyethylene (UHMWPE) has a molecular mass of the order of a millions of grams per mole. So, UHMWPE presents prominent properties, for instance, abrasion and impact resistance. However, due to its very high viscosity in the melt state, the preparation of composites by conventional extrusion and injection molding is not possible. Therefore, in this work we studied the possibility of incorporating montmorillonite (MMT) into the matrix of the UHMWPE in the solid state, via high energy milling. The formulations were prepared in Attritor mill by milling UHMWPE reactor powder and MMT. The samples were characterized by bulk density, XRD, AFM and SEM. Results show that this route of processing was effective to incorporate MMT into the matrix of UHMWPE.

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