Rheology: an interdisciplinary and comprehensive subject integrating mechanics, chemistry and engineering. It establishes the constitutive relations of materials such as non-Newtonian fluids, viscoelastic solids, and substances between fluids and solids through experimental or theoretical approaches. In other words, it develops mathematical models reflecting the macroscopic properties of materials, and studies the laws of material flow and deformation by applying constitutive relations as well as the conservation laws of momentum, mass and energy.
Testing: the evaluation of a measured physical quantity based on the output of a measurement system; that is, the test results reproduce the information of the measured physical quantity.
Reproduced information:
- Numerical correspondence and error between input and output — static testing (conventional Mooney viscometry or vulcanization testing, which focuses on whether the Mooney viscosity value or vulcanization characteristic value meets expectations or falls within the desired error range).
- Signal correspondence, reproduction and distortion between input and output — dynamic testing (whether differences exist between materials and the changing trend of such differences).