Polymer Char introduces IVA in response to the market’s need for a reliable and automated instrument for intrinsic viscosity analysis of polymeric materials, which can sometimes demand temperatures up to 200ºC for dissolution. IVA is based on the recently developed QC platform, which integrates in a reduced footprint, a robust dual-capillary relative viscometer combined with a high temperature autosampler of demonstrated reliability in several applications. As an option, the infrared detector IR4 can also be added.
The IVA stainless steel capillaries and tubing do not require additional washing or rinsing, and provide robust and precise viscosity values over time. The careful design of the heated compartment and transfer lines ensure that no cold spots are found and even the most challenging polymers can be analyzed.
When using IVA, the analyst places the vials with polymer into the autosampler external tray, where they stay at room temperature until they are scheduled for analysis under software control. Then the instrument brings the vials into the dissolution oven, fills them with solvent and starts shaking. Dissolution temperature, shaking intensity and time are accurately controlled so that the analyst can select the optimum conditions to achieve full dissolution while minimizing thermal degradation.