PA - Relative Viscosity - ASTM D789

The PSL Rheotek RPV-2 determins the Relative Viscosity of polyamides using glass capillary viscometers in accordance with ASTM D789. The test method requires a high 8.4% concentration. The viscosity of the polyamide solution is related to the solvent (90% Formic Acid). Flow times are measured at 25 deg. C using calibrated suspended-level Ubbelohde type viscometers - size 1 for the solvent and a larger size 2B or 3 for the Polyamide Solution.

The method requires that two successive flow times are obtained within 0.2% of the mean. The four position RPV-2 (4) is an ideal configuration for ASTM D789 allowing for one position to be dedicated to the measurement of solvent flow times. Cleaning is carried out in-situ using Formic Acid followed by Acetone. 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 wrist action shaker (WAS).



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  • RPV-2 Polymer Viscometer

    RPV-2 Polymer Viscometer PSL-Rheotek

    RPV- 2 (2) Request Quotation

    RPV-2 (4) Request Quotation

    • Intrinsic Viscosity
    • K-Value
    • Limiting Viscosity
    • Viscosity Number
    • Inherent Viscosity
    • Relative Viscosity

    The PSL-Rheotek RPV-2 Polymer Viscometer is suitable for measuring the dilute solution viscosity of a wide range of polymers. Applications include PA, PET, PVC, PLA, PBT, PC, PE, PP, Cellulose Acetate, Inks, Biopolymers, Pulp and cellulose.

    RPV-2  is designed for full integration with sample preparation and sample dissolution modules from PSL-Rheotek. Using these integrated options ensures full integrity of data from end to end in the measurement process.

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