The Effects of Polymer Chain Orientation on Wear Characteristics of
Medical Grade Ultra-High Molecular Weight Polyethylene (UHMW-PE)
Friction deposition of
UHMW-PE at determined
speeds, temperature and
pressure will result in highly
oriented thin films prepared
in the solid state from the
solid state
Objectives:
To develop a longer lasting, wear-resistant biomedical
UHMW-PE implant through advanced polymer chain
alignment via friction deposition.
Approach:
Development of a method of friction deposition based
on published methods of deposition of PTFE. Measure
wear resistance via scratch testing of thin films to
emulate implant surface morphology. Conclusions
based on the degree of visible chain alignment and
correlation to shear-induced wear resistance.
Impact:
Contact:
Polymer chain alignment has been shown to increase
the mechanical strength of certain polymers. Such
alignment in UHMWPE can serve as a method of
improving wear resistance of the contact surfaces of
implants used in hips, knees, etc. This result will
enable LONGER LASTING MEDICAL IMPLANTS to
be developed, eliminating the need for SURGICAL
REVISION in TKA and THA patients, both old and
young.
Dr. Christopher Li
Professor
Materials Science & Engineering
chrisli@drexel.edu
(215) 895-2083
soft.materials.drexel.edu