The Influence of Injection Molding and Injection Compression Molding on Ultra-high Molecular Weight Polyethylene Polymer Microfabrication

2011 ◽  
Vol 26 (5) ◽  
pp. 508-516 ◽  
Author(s):  
H.-C. Kuo ◽  
M.-C. Jeng
Keyword(s):  
Molecular Weight ◽  
Injection Molding ◽  
High Molecular Weight ◽  
Compression Molding ◽  
Injection Compression Molding ◽  
Polymer Microfabrication ◽  
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.

Wettability and Water Absorption of Irradiation Cross-Linked UHMWPE

2011 ◽  
Vol 287-290 ◽  
pp. 1402-1405 ◽  
Author(s):  
Zi Feng Ni ◽  
Guo Mei Chen
Keyword(s):  
Molecular Weight ◽  
Water Absorption ◽  
High Molecular Weight ◽  
Gamma Rays ◽  
Absorption Rate ◽  
Compression Molding ◽  
Thermal Compression ◽  
Molding Method ◽  
Water Absorption Rate ◽  
Ultra High Molecular Weight

Ultra-high molecular weight polyethylene (UHMWPE) was prepared by thermal compression molding method and was irradiated by gamma rays at dose of 100 kGy in air. The wettability and water absorption of non-irradiated and irradiation crosslinked UHMWPE were investigated. It was shown that irradiation crosslinking increased the wettability of UHMWPE. The water absorption rate of UHMWPE was extremely low (<0.02%). After irradiation crosslinking, the water absorption rate of UHMWPE increased.

scholarly journals The Features of Rheological and Tribological Behavior of High-Viscosity Polyolefine Compositions Depending on Their Content

2021 ◽  
Vol 15 (4) ◽  
pp. 486-492
Author(s):  
Mykhailo Bratychak Jr ◽  
◽  
Victoria Zemke ◽  
Natalia Chopyk ◽  
◽  
...  
Keyword(s):  
Molecular Weight ◽  
Friction Coefficient ◽  
Injection Molding ◽  
Polymer Blends ◽  
High Molecular Weight ◽  
Tribological Behavior ◽  
High Viscosity ◽  
Energy Costs ◽  
Technological Properties ◽  
Ultra High Molecular Weight

The influence of additive nature as well as its ratio on the rheological, tribological and technological properties of blends based on ultra-high molecular weight polyethylene has been determined. The energy costs impact in the polymer blends processing has been studied. It is shown that the rheological and tribological properties of the samples have a complicated dependence, which is determined by inhomogeneity of the system. The paper takes into consideration the influence of the friction coefficient of material and the viscosity of its melt on energy costs during processing by injection molding or extrusion

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