The role of long lived free radicals in the ageing of irradiated ultra high molecular weight polyethylene

1999 ◽  
Vol 63 (1) ◽  
pp. 31-39 ◽  
Author(s):  
P. O’Neill ◽  
C. Birkinshaw ◽  
J.J. Leahy ◽  
R. Barklie
Keyword(s):  
Molecular Weight ◽  
Free Radicals ◽  
High Molecular Weight ◽  
Ultra High Molecular Weight

scholarly journals Role of Sintering Temperature in Production of Nepheline Ceramics-Based Geopolymer with Addition of Ultra-High Molecular Weight Polyethylene

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1077
Author(s):  
Romisuhani Ahmad ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Wan Mastura Wan Ibrahim ◽  
Kamarudin Hussin ◽  
Fakhryna Hannanee Ahmad Zaidi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Sintering Temperature ◽  
Ceramic Materials ◽  
Microstructural Properties ◽  
Sintering Process ◽  
Final Microstructure ◽  
Change Of Microstructure ◽  
Ultra High Molecular Weight

The primary motivation of developing ceramic materials using geopolymer method is to minimize the reliance on high sintering temperatures. The ultra-high molecular weight polyethylene (UHMWPE) was added as binder and reinforces the nepheline ceramics based geopolymer. The samples were sintered at 900 °C, 1000 °C, 1100 °C, and 1200 °C to elucidate the influence of sintering on the physical and microstructural properties. The results indicated that a maximum flexural strength of 92 MPa is attainable once the samples are used to be sintered at 1200 °C. It was also determined that the density, porosity, volumetric shrinkage, and water absorption of the samples also affected by the sintering due to the change of microstructure and crystallinity. The IR spectra reveal that the band at around 1400 cm−1 becomes weak, indicating that sodium carbonate decomposed and began to react with the silica and alumina released from gels to form nepheline phases. The sintering process influence in the development of the final microstructure thus improving the properties of the ceramic materials.

Role of nano-fillers on tribological behaviour of ultra high molecular weight polyethylene composites

2020 ◽  
Vol 27 ◽  
pp. 2169-2173
Author(s):  
B. Suresha ◽  
B. Harshavardhan ◽  
Ashwij M. Rao ◽  
U.R. Koushik ◽  
R. Hemanth
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Tribological Behaviour ◽  
Ultra High Molecular Weight ◽  
Polyethylene Composites

In Vivo Oxidation of Retrieved Cross-linked Ultra–High-Molecular-Weight Polyethylene Acetabular Components with Residual Free Radicals

2006 ◽  
Vol 21 (7) ◽  
pp. 1005-1011 ◽  
Author(s):  
Keith K. Wannomae ◽  
Shayan Bhattacharyya ◽  
Andrew Freiberg ◽  
Daniel Estok ◽  
William H. Harris ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Free Radicals ◽  
High Molecular Weight ◽  
Acetabular Components ◽  
Ultra High Molecular Weight
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