PVC - IV - ASTM D1243

PVC - Intrinsic Viscosity - ASTM D1243

The PSL Rheotek RPV-3 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.

Step by step

The method requires that repeat flow times are obtained within 0.1% precision. For this application the dual position RPV-3 (2) is an ideal configuration as well as the four position RPV-3 (4). The iSP-1 Sample Preparation system can be used in conjunction with the RPV-3 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)