Rheological properties of polymers are measured to evaluate their deformation characteristics and flow behavior for processing, application and performance. The rheological properties of polymer are very important for the optimization of processing technology, product design and performance prediction of polymer products.

A rheometer is a commonly used experimental device for measuring the rheological properties of materials, including polymers. Rheological properties of polymers refer to their deformation and flow behavior under external forces.

A variety of rheological properties of polymers can be tested using rheometers, including:

Rheometer to measure polymer rheological properties

Shear stress and shear rate relationship: Rheometers can apply different shear stresses or shear rates to measure the stress-strain behavior of polymers. This can be used to evaluate polymer viscosity, shear dilution effect and shear thinning effect, etc.

Dynamic shear tests: Rheometers can perform dynamic shear tests to study the polymer response at different frequencies and amplitudes. This helps to understand the dynamic rheological behavior of polymers, such as elastic modulus, storage modulus and loss modulus.

Temperature dependence of rheological properties: Rheometers can be tested at different temperatures to study the temperature dependence of polymer rheological properties. This can be used to understand the melting behavior of polymers, glass transition temperature, etc.

Thixotropy tests: Rheometers can perform thixotropy tests to study the viscosity changes of polymers at rest and after the application of shear forces. This allows assessing the thixotropy and recovery of the polymer.

Testing the rheological properties of polymers with rheometers provides important information about the properties and behavior of polymer materials, helping to optimize material formulation, improve process and application field design.