Polymer long chain branching is used to modify the processability and melt properties of polymer pellets. The e-beam irradiation creates side chains and often increases molecular weight. This is done without creating a 3D network, such as is created during the crosslinking process.
Crosslinking is generally performed on molded parts, whereas long chain branching is performed on pellets. A much lower dose is needed for long chain branching than for crosslinking.
To learn more about the history and technology behind long chain branching, check out our 3-part blog series.
The side chains often entangle, increasing the melt strength of the polymer, allowing for downgauging, long draw thermoforming, creation of lower density foams, and other applications.
Everyday Applications
- Foam
- Film
- Extrusion coating
- Extrusion blow molding
- Thermoformed trays and containers
- Automotive interiors
Why it Matters to You:
| No harmful chemicals | Customizable melt index |
| Dramatically expanded melt processability | Improved melt strength |
| High throughputs | Consistent, reproducible results |