Crystallinity in PEEK
Polyether ether ketone (PEEK) is finding its way into more and more medical devices, due to its high strength, resistance to oxidation, bioinertness, and ease of manufacturing. PEEK is a semi-crystalline thermoplastic, and the crystallinity is strongly dependant on the processing conditions used to form a PEEK component, such as molding and cooling temperatures, sample size, shear rate, and post-molding conditions, such as tool speed and cold working. In a paper presented at the International PEEK meeting in Philadelphia in April, 2013, CPG researchers, along with collaborators from Brigham and Woman's Hospital and Stryker Orthopedics, discuss different techniques to measure crystallinity in PEEK, including density, DSC, X-ray, and infrared spectroscopy. Work was performed on 4 different PEEK formulations with differing molecular weights.
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