Multitechnique characterization of articular surfaces of retrieved ultrahigh molecular weight polyethylene acetabular sockets

1999 ◽  
Vol 48 (3) ◽  
pp. 365-373 ◽  
Author(s):  
Evangelos A. Magnissalis ◽  
George Eliades ◽  
Theodore Eliades
Keyword(s):  
Molecular Weight ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Articular Surfaces ◽  
Ultrahigh Molecular Weight

Structural characterization of ultrahigh-molecular-weight polyethylene reactor powders based on fuming nitric acid etching

Polymer ◽  
1998 ◽  
Vol 39 (24) ◽  
pp. 6127-6135 ◽  
Author(s):  
Hiroki Uehara ◽  
Mitsuhiro Nakae ◽  
Tetsuo Kanamoto ◽  
Osamu Ohtsu ◽  
Akira Sano ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Nitric Acid ◽  
Structural Characterization ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Acid Etching ◽  
Ultrahigh Molecular Weight ◽  
Fuming Nitric Acid

Preparation and Characterization of MWCNT/Ultrahigh-Molecular-Weight Polyethylene Composite Fiber

2012 ◽  
Vol 627 ◽  
pp. 761-764
Author(s):  
Tao Zhang ◽  
Tian Ma ◽  
Jian Chun Zhang ◽  
Peng Gang Gao ◽  
Hua Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Precursor Solution ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Composite Fiber ◽  
Gel Spinning ◽  
Polyethylene Composite ◽  
Ultrahigh Molecular Weight ◽  
Aggregation Structure ◽  
Uhmwpe Fibers

MWCNT/Ultrahigh-molecular-weight polyethylene (MWCNT/UHMWPE) composite was prepared by adding purified MWCNTs into the precursor solution of UHMWPE. Based on that, MWCNT/UHMWPE fibers were obtained using a gel spinning-molding technique. The thermal, mechanical and aggregation structure of MWCNT/UHMWPE fibers were characterized by TGA, mechanical property measurement and XRD, respectively. The results indicated the incorporation of MWCNTs into UHMWPE macromolecular chains have not change the aggregation structure of UHMWPE significantly, and the as-prepared MWCNT/UHMWPE fibers have evidently improved thermal stability and mechanical strength compared with the pristine UHMWPE fibers.

Characterization of a Highly Cross-linked Ultrahigh Molecular-Weight Polyethylene in Clinical Use in Total Hip Arthroplasty

2008 ◽  
Vol 23 (5) ◽  
pp. 751-761 ◽  
Author(s):  
Michel P. Laurent ◽  
Todd S. Johnson ◽  
Roy D. Crowninshield ◽  
Cheryl R. Blanchard ◽  
Sushil K. Bhambri ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Clinical Use ◽  
Total Hip ◽  
Ultrahigh Molecular Weight

Thermo-Mechanical Behaviour of Ultrahigh Molecular Weight Polyethylene-Carbon Nanotubes Composites under Different Cooling Techniques

2011 ◽  
Vol 312-315 ◽  
pp. 331-340 ◽  
Author(s):  
S. Kanagaraj ◽  
A. Fonseca ◽  
R.M. Guedes ◽  
Monica S.A. Oliveira ◽  
José A.O. Simões
Keyword(s):  
Molecular Weight ◽  
Milling Time ◽  
Loss Modulus ◽  
Physical And Mechanical Properties ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Elastic Behaviour ◽  
Artificial Joints ◽  
Ultrahigh Molecular Weight ◽  
Higher Temperature

Ultrahigh molecular weight polyethylene (UHMWPE) is a unique polymer with outstanding physical and mechanical properties that makes it particularly attractive to fabricate the bearing surface for artificial joints. Despite the requirement of visco-elastic properties of the UHWMPE and its composites, the characterization of them has received relatively little attention. The objective of this work is concerned with the studies on visco-elastic behaviour of UHMWPE and nanocomposites, which were prepared at optimized ball milling time with different cooling techniques. It is observed that stiffness of the materials increases appreciably at 0.2wt.% CNTs with an increase of frequency till 30Hz which confirms the reinforcing effect of CNTs in composites. The loss modulus of the sample is observed to be converged at higher temperature irrespective of frequency. The damping effect of the sample could be kept within the limit of polymer at any frequency range when the temperature is low and it is also possible at any temperatures at higher frequencies except LN2 cooled sample. The relaxation fraction increases with an increase of temperature and decreases with an increase of frequency. It is concluded that air cooled sample could be used wherever modulus is the main criteria irrespective of temperature and frequency, LN2 cooled sample can be used where more damping is required and water cooled samples may be used where more strength and toughness are required.

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