Molecular Weight Characterization to Assess Aging in Ultra High Molecular Weight Polyethylene
Ultra high molecular weight polyethylene (UHMWPE) is commonly used as a bearing surface in hip, knee, shoulder, and other total joint replacement arthroplasties. Aging of UHMWPE that has been irradiated without additional treatment to stabilize the residual free radicals can result in oxidation followed by chain scissioning. Researchers will usually measure oxidation index to characterize […]
Choc Full of Information
Chocolate is a complex structure containing consisting of cocoa powder, sugar, fat solids (primarily cocoa butter). The cocoa powder and cocoa butter both come from the cocoa bean following roasting, grinding, and liquification. The flavor and mouth feel of chocolate will depend on the ratios of these components, as well as their size and structure. […]
Bubble Point for Pore Size Measurements
The pore size in filters, membranes, and fabrics can be determined at Cambridge Polymer Group by a variety of methods, including optical and scanning electron microscopy, mercury porosimetry, and particle size exclusion. A commonly used method is ASTM F316 “Pore size characteristics of membrane filters by bubble point and mean flow pore test.” This standard […]