Process-Induced Effects in Compression Molding of Ultra-High Molecular Weight Polyethylene (UHMWPE)

2009 ◽  
pp. 5-5-19 ◽  
Author(s):  
K Ramani ◽  
NC Parasnis
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Compression Molding ◽  
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.

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