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On‐Line Monitoring of Molecular Weight Using NIR Spectroscopy in Reactive Extrusion Process
Author(s) -
Bergmann Björn,
Becker Wolfgang,
Diemert Jan,
Elsner Peter
Publication year - 2013
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201300043
Subject(s) - extrusion , reactive extrusion , polyester , near infrared spectroscopy , materials science , size exclusion chromatography , spectroscopy , infrared spectroscopy , polyethylene terephthalate , process analytical technology , polyethylene , analytical chemistry (journal) , chemical engineering , chromatography , chemistry , composite material , organic chemistry , quantum mechanics , engineering , physics , bioprocess , enzyme
Summary Near infrared spectroscopy (NIR) is a versatile tool for process control, scientific research and quality management. Consequently it is our aim to utilize NIR technique for the understanding and following of reactive extrusion processes. As preliminary results it was shown the molecular weight of degraded, non‐purified polyester can be measured and forecasted using purely NIR spectra analysis. In this paper we describe the close correlation of the received molecular weight values of partly glycolised Polyethylene terephthalate (PET) samples using reactive extrusion, measured using size exclusion chromatography (SEC) techniques and chemometric models basing on NIR measurements.