Rotational rheometer

Rheological application in thermoplastics in research, development, analysis department, process and quality control, whether it is the quality control of products, or the development of new rheological tests has become an indispensable tool. Rheological tests can help users thermoplastic material microstructure information linked to their flow behavior. For example, the molecular weight of the polymer to its viscosity at low shear rates, the molecular weight distribution and the degree of branching relationship between viscosity and shear rate has a significant impact. Other testing methods, such as melt index (MFI) or capillary, these structural differences at low shear rate is not sensitive. At the same time, the viscosity in solving technological problems is not enough, we must also consider the impact of elasticity. Problems elastic modulus of the material can be used to predict product processing surface defects: such as extrusion, injection molding hot deformation, stability, etc. blown bubbles. Solid performance thermoplastic materials useful in predicting the performance of the final product. For example, dynamic mechanical test temperature scan mode, you can measure the resulting glass transition and a secondary change for impact resistance and other temperature-related material performance prediction. Using online rheometer can easily solve this problem. Specially designed instrument can effectively prevent the influence of atmospheric water vapor of the material. PET due to hydrolysis melt viscosity and molecular weight thermoplastic materials sensitive entirely possible within a few minutes of measuring the water content as low as 0.001%. The figure is the water vapor effect on PET melt viscosity of the sample. For more information, please contact: http: //www.brooktj.com/ http://www.brooktj.com/products/