Extruder-Raman | Combining Extrusion and Raman Spectroscopy: Monitoring LDPE Phase Transitions In-Line
The combination of a TwinLab twin screw extruder with Cora 5001 Raman spectrometer allows in-line monitoring of phase transitions and melting behavior of LDPE
Understanding the structural changes of polymers during extrusion is essential for optimizing process parameters and ensuring consistent material properties. So far, there was no analytical access to the molecular transformations occurring inside an extruder, which remained a “black-box”. Only the end product could be analyzed ex-situ and after the extrusion process is completed. This adds to development times as well as material consumption and costs owing to multiple reprocessing cycles until optimal material properties and process parameters are established.
Understanding the phase transitions of LDPE in the extruder helps in defining process parameters and extruder settings during scale-up to production.
An in-situ monitoring of the molecular transformations with Anton Paar’s Cora 5001 Raman spectrometer with a fiber probe placed directly inside an extruder provides analytical data to shorten the development cycles, optimize process parameters and speed as well as ensuring final product quality. In case of deviations to production quality, a root cause analysis can be faster and based on analytical evidence rather than assumptions.
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