Influencing factors of viscosity measurement by rotational method

• Published in: Polymer testing 2018-09, Vol.70, p.144-150
• Main Authors: Zhang, Yinglan, Huang, Mengmeng, Kan, Ying, Liu, Lianying, Dai, Xiaoping, Zheng, Guiling, Zhang, Zhengdong
• Format: Article
• Language: English
• Subjects: Accuracy; Cylinders; Geometries; Geometry; Heat balance; Polymer liquid; Polymers; Rheological properties; Rotational method; Sampling; Shear viscosity; Test procedures; Viscometers; Viscosity; Viscosity measurement
• ISSN: 0142-9418; 1873-2348
• DOI: 10.1016/j.polymertesting.2018.06.034

Rotational rheometer was used to measure the shear viscosity of a liquid reference material of viscosity named GBW13604. The influences of heat balance time, bath temperature, environment temperature and sampling volume on results of measurements were investigated. Furthermore, a comparison of accuracy and repeatability of shear viscosity results between two commonly used systems with cone–plate and coaxial cylinder geometry was performed. Rheological tests indicate that the coaxial cylinder method is applicable to tests requiring high accuracy, while the cone-plate method is suitable for measurements that demand low sampling volume and fast speed. •Studied effects of heat balance time, bath temperature, environment temperature and sample volume on viscosity measurement.•Compared accuracy and repeatability of shear viscosity results between cone–plate and coaxial cylinder geometries.•The measurement error generated by the influencing factors was quantified, which provided guidance for related fields.