In Parts 1 and 2 of this series on intermolecular attractive forces in polymers, discussions of London Dispersion Forces (LDFs)1 and dipole-dipole attractions2, respectively, were presented. In Part 3, we will discuss an unusually strong type of dipole-dipole attraction – one so strong that it generally is classified as a separate type of intermolecular attractive force: … [Read more...] about Intermolecular Attractive Forces: The Key to Understanding Polymer Properties, Part 3
2022 Quarter 2
A Long-Lived EB: Machine Function and Maintenance, Part 2
Part 1 of this article reviewed the basics of how a low-energy electron beam operates and the commonly consumable parts that are needed to keep it in operation.1 Without any fanfare, let’s dive right back into mid-range consumable parts. As previously mentioned, the cathode assembly is operated under high vacuum (typically 10-7 Torr). High vacuum is necessary to keep the … [Read more...] about A Long-Lived EB: Machine Function and Maintenance, Part 2