PVC - Inherent Viscosity - ASTM D1243

The PSL Rheotek RPV-2 determines the inherent viscosity (logarithmic viscosity number) of vinyl chloride polymers in dilute solution using glass capillary viscometers in accordance with ASTM D1243. The test method requires a 0.2% concentration. The dissolving solvent is Cyclohexanone. Solvent and solution flow times are measured at 30 deg. C using a size 1 suspended-level Ubbelohde type viscometer for both measurements. The method requires that repeat flow times are obtained within 0.1% precision. 

For this application the dual position RPV-2 (2) is an ideal configuration as well as the four position RPV-2 (4). The iSP-1 Sample Preparation system can be used in conjunction with the RPV-2 to prepare samples on a precise weight to weight basis. Dissolution is carried out using a reaction block with stirring and heating at a closely controlled temperature (85 deg. C) with a programmable timer (SD-BM).

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