POLYAMIDE (PA) Relative Viscosity & Viscosity Number

The RPV-1 Gen. 2 Polymer Viscometer is suitable for the determination of Relative Viscosity and/or the Viscosity Number of Polyamide (PA) also referred to as nylon. Today this polymer is used in airbags, carpet, automotive components, pipes and many more applications. Most people will be familiar with the product from consumer textiles. Depending on the grade of nylon, it may be dissolved in Formic Acid, m-Cresol or sulphuric acid. The determination of the Viscosity Number provides a measure of the relative molecular mass of the polymer.

The RPV-1 Gen. 2 provides a complete solution for the solution viscosity of polyamides, including sample preparation, sample dissolution, flow time measurement and full reporting of results, as specified in ISO 1628 Part 1, ISO 307 and ASTM D789.

ISO 307 covers the determination of the Viscosity Number of a low 0.5% concentration of the polymer solution. Solvent and solution flow times are measured at 25 deg. C using the same size of suspended-level Ubbelohde type viscometer for both measurements. For Formic Acid a size 1 viscometer is used and a size 2 for Sulphuric Acid or m-Cresol. The method requires that two successive flow times are obtained within a 0.25% precision. For each polyamide sample, ISO 307 also requires at least two determinations of the viscosity number in order to meet the repeatability test criteria. The dual position RPV-1 (2) Gen. 2 is an ideal configuration as well as the four position RPV-1 (4) Gen. 2. The iSP-1 Sample Preparation system can be used in conjunction with the RPV-1 to prepare samples on a precise weight to weight basis. Dissolution is carried out either using a wrist action shaker (WAS) for samples dissolved in Formic Acid or Sulphuric Acid and a reaction block with stirring and heating at 90 to 100 deg. C with a programmable timer. (SD-BM).

ASTM D789 covers the determination of relative viscosity of a high 8.4% concentration of polyamide dissolved in 90% formic acid. For this method, the solvent and polymer solution will need to be measured in different sizes of viscometer. The RPV-1 (4) Gen. 2 is the ideal configuration integrated with the ISP-1 sample preparation system.

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  • RPV-1 Two positions Polymer Viscometer PSL-Rheotek

    RPV-1 Polymer Viscometer

    RPV-1 (2) Request Quotation

    The PSL Rheotek RPV-1  (2) Two position polymer viscometer system is suitable for measuring the dilute solution viscosity of a wide range of polymers dissolved in acids, organic solvents or water, including PA, PET, PVC, PLA, PBT, PC, PE, PP, Cellulose Acetate, Inks, bio-polymers and other.

    RPV-1 systems are designed to be integrated with the SP-1 Sample Preparation system for polymers.

    Other options include RPV275 Sample dissolution and RSS Rheotek Smart Sampler.

    Part No. RPV-1 (2)

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    Please e-mail to sales@psl-rheotek.com for a quotation.
  • Two positions Polymer viscometer with sampler PSL-Rheotek

    RPV-1 Polymer Viscometer with Auto Sampler

    RPV-1 (2) RSS Request Quotation

    The PSL Rheotek RPV-1  (2) RSS Two position polymer viscometer system with smart sampler is suitable for measuring the dilute solution viscosity of a wide range of polymers dissolved in acids, organic solvents or water, including PA, PET, PVC, PLA, PBT, PC, PE, PP, Cellulose Acetate, Inks, bio-polymers and other.
    The RPV-1 is designed to be integrated with the SP-1 Sample Preparation system for polymers.

    Part No. RPV-1 (2) RSS

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    Please e-mail to sales@psl-rheotek.com for a quotation.
  • Four positions Polymer Viscometer PSL-Rheotek

    RPV-1 with 4 Viscometer positions

    RPV-1 (4) Request Quotation

    The PSL Rheotek RPV-1  (4) four position polymer viscometer system is suitable for measuring the dilute solution viscosity of a wide range of polymers dissolved in acids, organic solvents or water, including PA, PET, PVC, PLA, PBT, PC, PE, PP, Cellulose Acetate, Inks, bio-polymers and other.

    RPV-1 systems are designed to be integrated with the SP-1 Sample Preparation system for polymers.

    Other options include SD-1 Sample dissolution and RSS Rheotek Smart Sampler.

    Part No. RPV-1 (4)

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    Please e-mail to sales@psl-rheotek.com for a quotation.
  • Two positions Auto PA polymer system PSL-Rheotek

    RPV-1 (2) AutoPA

    RPV-1 (2) AutoPA Request Quotation

    The PSL Rheotek RPV-1 (2) AutoPVC two position AutoPVC viscometer system is is configured specifically for fully automating the Reduced Viscosity of Polyamides (PA), nylon, dissolved in m-Cresol in accordance with ISO 307.

    Auto systems fully integrate sample preparation, sample dissolution & sample loading, as well as flow time measurement, cleaning and reporting of results. One or two heating and stirring zones can be configured to control the dissolution of batches of samples. Both heating temperatures and stirring times are computer controlled and samples are cooled prior to being automatically loaded into the viscometer. Typical sample throughput is 6 to 8 samples per hour with two measuring positions.

    Part No. RPV-1 (2) AutoPA

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    Please e-mail to sales@psl-rheotek.com for a quotation.

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