Viscometer
Polymer Char’s viscometer detectors are designed to provide on-line viscosity data of polymers in solution.
Integrated in Polymer Char’s GPC-IR, CEF, and CRYSTEX QC / CRYSTEX 42 instruments, the viscometer provides valuable information that enhances the primary data obtained by each separation technique.
In instruments like IVA and IVA Versa, the viscometer becomes the central part of the instrument providing its main functionality: analyzing the intrinsic viscosity of polymers.
Polymer Char’s viscometer design is based on the patented technology of differential pressure capillary viscometers (Wallace W. Yau US4793174A). This technology operates by measuring the pressure drop across a capillary tube when a fluid flows through it. This pressure drop is caused by the resistance offered by the fluid to flow through the capillary, which is directly related to the fluid’s viscosity. By accurately determining the pressure drop and considering other parameters like the capillary dimensions and flow rate, the viscosity of the fluid can be calculated.
HOW INTRINISC VISCOSITY IS CALCULATED USING A DIFFERENTIAL PRESSURE CAPILLARY VISCOMETER
Calculating intrinsic viscosity using a differential pressure capillary viscometer involves determining the viscosity of the polymer in solution and the viscosity of the solvent. From these values, the intrinsic viscosity of the polymer can be obtained by applying different equations. Read more about Intrinsic Viscosity Determination
• High sensitivity
• Configurations with dual capillary or 4-capillary bridge are available according to each technique
• Purge valves included
• Robust design even for most challenging polymers
No, the viscometer is designed as a compact detector to be integrated into Polymer Char’s instruments. If you are looking for a standalone viscosity meter, please check our Intrinsic Viscosity Analyzers.
Yes, the viscometer needs to be calibrated with reference samples of known viscosity.
· In GPC technique, the advantage of having an online viscometer is that it allows for the application of the Universal Calibration principle, and the analysis of Long-chain Branching (LCB).
· In CEF/TGIC, a viscometer detector will provide the bulk Intrinsic Viscosity (IV), which is related to the molar mass of the polymer, therefore, information on molar mass and chemical composition interdependence can be obtained by adding a viscometer detector.
· In CRYSTEX, a viscometer detector will provide intrinsic viscosity results for the whole sample, the soluble fraction, and the crystalline fraction.
Thank you for your interest. If you would like to know more about our detectors or have any question,
please fill out the form below and we will be contacting you.
An overview of the Intrinsic Viscosity Analyzer high-temperature and ambient temperature models by Polymer Char
Webinar Brazilian Polymer Conference
Date: October 2021
Speaker: Alberto Ortín
Published in Wiley Online Library
December 2022
Published in Plastics Engineering (SPE)
May 2018
Pages 48-51
B. Monrabal, A. Ortín, P. del Hierro
Revised for publication in The Column
April 2018
Pages 34-38
Published in The Column
February 2014
Pages 18-23
B. Monrabal, A. Ortín, P. del Hierro
Published in LCGC NA and EU
The Applications Notebook
Pages 709-710
December 2013
B. Monrabal, A. Ortín, P. del Hierro
Poster
Presented at the 8th ICPC
2023
Poster
Presented at the 8th ICPC
2023
Poster
Presented at the GPC Conference
2015
Poster
Presented at the 5th ICPC
2014
Poster
Presented at Pittcon
2011
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