There is a wide variety of adhesives. When classified according to their characteristics, they generally include hot - melt adhesives, epoxy adhesives, electronic adhesives, UV - curable adhesives, polyurethane adhesives, silicone adhesives, etc. These are all polymers synthesized from polymer materials and contain long polymer chains. Therefore, the rheological properties of adhesives are of great significance for characterizing adhesives.

The rheological parameters of adhesives are measured by a rheometer. The rheometer consists of a torque sensor at the top and a motor at the bottom. The motor drives the measuring fixture, which can measure through rotation or other means. Finally, the detector senses the rotation of the sample.

The principle is similar to that of a viscometer, but it has diverse functions, rich methods, various fixtures and temperature control options, and high - precision testing.

During the test, different rotors can be selected according to the samples or test conditions. There are coaxial cylinder rotors, cone - plate rotors, and flat - plate rotors available.

It is reported that common test methods include flow curve testing, yield stress testing, thixotropy testing, viscosity - temperature testing, viscoelasticity testing, creep testing, thermomechanical testing, and curing testing. Next, we will briefly introduce some of these test methods and analyze the significance of different parameters.