Crosslinked materials can be stretched while hot and "frozen" in place; when reheated, the crosslinks pull the material back to its original shape (the principle behind heat-shrink tubing). 5. Why E-Beam Over Chemical Methods?
Electron beam (E-beam) crosslinking is a physical process that transforms a thermoplastic polymer into a thermoset-like material by using high-energy electrons to create a three-dimensional molecular network . Unlike chemical crosslinking, which relies on heat and chemical catalysts, E-beam processing is fast, precise, and occurs at room temperature. 1. The Physics of the Process How Does The Electron Beam Crosslinking Process...
The electrons collide with the polymer chains, knocking off hydrogen atoms and leaving behind "free radicals" (unpaired electrons) on the carbon backbone. Crosslinked materials can be stretched while hot and
These free radicals are unstable and "seek" stability. They migrate along the polymer chains or jump between adjacent chains. Electron beam (E-beam) crosslinking is a physical process
By altering the molecular structure, E-beam crosslinking significantly enhances the physical properties of the material:
It increases tensile strength, abrasion resistance, and toughness.