PVC - K-Value - ISO 1628-2

The PSL Rheotek RPV-2 determins the reduced viscosity (viscosity number) and K-value of Polyvinyl Chloride (PVC) resins (in powder form) in dilute solution using glass capillary viscometers in accordance with ISO 1628 Part 2.

The test method requires a 0.5% concentration. The PVC powder is dissolved in Cyclohexanone. Solvent and solution flow times are measured at 25 deg. C using a size 1C suspended-level Ubbelohde type viscometer for both measurements.

The method requires that two successive flow times are obtained within a 0.25% precision. It should be noted that two complete determinations are required, each starting with a fresh test portion. K-value results from the two determinations should agree within +/- 0.4% from the mean value.

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 (80 to 85 deg. C) with a programmable timer (SD-BM).

Software options include: ISO 1628 Part 2: K value; DIN 53726: K value; JIS K 6721 Mean Polymerization Degree.

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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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