ISO 1628-4 Plastics - Determination of Viscosity of Polymers in Dilute Solution Using Capillary Viscometers - Part 4: Polycarbonate (PC) Molding and Extrusion Materials

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 1628-4 testing. This part of ISO 1628 describes the conditions for determining the viscosity number (also known as reduced viscosity) and relative viscosity of polycarbonates in dilute solution.

It can be used for pure polycarbonates and blends with other polymers, as defined in ISO 7391-1, as well as blends of both, filled or unfilled.

Experience has shown that the high level of accuracy required when determining the viscosity number of polycarbonate solutions is not always achieved with commercially available Ubbelohde viscometers. The reason for this lies in the small irregularities in the capillaries. Therefore, it is necessary to check the accuracy of the capillaries used with the aid of suitable reference materials.

Approximately 5 g of the tested material is weighed into a 100 ml measuring flask. Add about 70 ml of dichloromethane and put it in the shaker until it is completely dissolved. The sample can be mechanically crushed prior to this step to increase the dissolution rate.

EUROLAB assists manufacturers with ISO 1628-4 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.