1994
DOI: 10.1002/pen.760342308
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In‐line monitoring of titanium dioxide content in poly(ethylene terephthalate) extrusion

Abstract: Peak absorbance changes correlated to changes in species concentration have been the norm in applied spectroscopy, while baseline shifts have been more of an inconvenience. Taking the first or second derivative of the spectra eliminates these baseline shifts. However, with multivariate techniques becoming more readily available, repeatable baseline changes may now be monitored and correlated to specific physical changes. This concept has been studied by monitoring the concentration of titanium dioxide (TiO2), … Show more

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Cited by 22 publications
(14 citation statements)
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“…The ultrasound measurements were found to be sensitive to ®ller type, particle size and dispersion. Other workers [20,21] have reported the use of spectroscopy for monitoring ®ller and additive concentration in compounding. Titanium dioxide ®ller in poly(ethylene terephthalate) and anti-oxidant additives in polyethylene have been examined.…”
Section: Rheological Characterisation Of Filled Polymersmentioning
confidence: 99%
“…The ultrasound measurements were found to be sensitive to ®ller type, particle size and dispersion. Other workers [20,21] have reported the use of spectroscopy for monitoring ®ller and additive concentration in compounding. Titanium dioxide ®ller in poly(ethylene terephthalate) and anti-oxidant additives in polyethylene have been examined.…”
Section: Rheological Characterisation Of Filled Polymersmentioning
confidence: 99%
“…[35][36][37][38][39][40][41][42][43][44][45][46][47] Another point of interest is the in-line monitoring of hot polymer melts in extruders with high temperature and high pressure probes. [48][49][50][51][52][53][54][55][56][57][58] For instance, quantitative analysis of filled PET with particulate inorganic components has been performed by NIR in conjunction with chemometric methods; baseline shifts can be used to determine the amount of filler. 58…”
Section: On-line Analysismentioning
confidence: 99%
“…L'addition de charges minérales, même si elle n'absorbent pas, entraîne une diffusion de la lumière et des dérives de la ligne de base. Cet inconvénient a été transfo rmé en ava n t age, en utilisant des méthodes ch i m i o m é-triques le dosage des charges peut se faire avec une bonne précision à la sortie de l'extrudeuse [49].…”
Section: Analyse En Ligneunclassified