In order to meet the market’s need for a reliable, safe and automated instrument for
Intrinsic Viscosity (IV) analysis of polymeric materials in solution, Polymer Char
introduces the Intrinsic Viscosity Analyzer (IVA). Intrinsic viscosity can be
considered as an indirect measurement of the average molar mass and, this provides
valuable information within any polymer characterization process.
IVA is based on Polymer Char’s recently developed QC platform, which integrates, in
a reduced footprint, a robust dual-capillary relative viscometer combined with a
high-temperature auto sampler which can accommodate up to 42 samples. IVA is used to
analyze a wide range of polymers with IV values from 0.5dL/g up to over 40dL/g, such
as polyolefins, PET, PAN, PMMA, and others, by using almost any organic solvent. All
of the Intrinsic Viscosity results are in good agreement with the traditional
methods of reference (compared to the IV obtained with glass capillaries or the
Ubbelohde type. ISO 1628-3:2010 f.i.).
When operating the IVA, the user places the vials with polymer into the auto
sampler's external tray at room temperature. The instrument will then takes the
vials into the dissolution oven, fills them with solvent and the shaking process
starts. Dissolution temperature, shaking intensity, non-oxidative atmosphere with
nitrogen, and time can be accurately controlled so that the user can select the
optimum conditions to achieve full dissolution while minimizing thermal degradation.
The analysis of polyolefins and other polymers which contain significant C-H content
can be further improved by the incorporation of the optional Infrared detector IR4
to accurately quantify the injected polymer’s mass. This option will contribute to
higher precision and accuracy of intrinsic viscosity determination.
Another advantage of the instrument is the capillaries and tubing do not require
manual washing or rinsing and provide robust and precise viscosity values over time.
The unique design of the heated compartment and transfer lines in the instrument
ensure that no cold spots are found and that even the most difficult polymers can be