EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 1628-3 testing. ISO 1628-3 defines special conditions for determining the reduced viscosity (also known as the viscosity number) and intrinsic viscosity of polyethylenes and polypropylenes at 135 °C in dilute solution.
The viscosity of polymer solutions can be affected by the additives present in the sample. Therefore, if the sample contains fillers or other additives, the reduced viscosity value determined by this method may not be reliable.
The flow times of a solvent and the flow times of a polymer solution of a certain concentration in that solvent are measured at 135°C. The reduced viscosity and intrinsic viscosity are calculated from these measurements and from the known concentration of the solution.
Ethylene polymers and isotactic polypropylenes are insoluble in any known solvent at room temperature. Therefore, precautions must be taken during testing to prevent any polymer precipitation that would give an incorrect solution concentration.
The precision of this test method is unknown as interlaboratory data are not available. This method may not be suitable for use in specifications or in case of controversial results unless these data are available.
EUROLAB assists manufacturers with ISO 1628-3 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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