Читать книгу The Rheology Handbook - Thomas Mezger - Страница 163

Rheological tests are physical tests and usually it is assumed that the chemical structure of the sample does not change during the measurement. However, if it is aimed to determine time-

dependent flow behavior during a hardening process, e. g. during a chemical curing reaction, then both: shear conditions and measuring temperature should be kept constant (thus testing takes place at isothermal conditions). The shear load should be sufficiently low to ensure an undisturbed hardening or curing process; for example, at a shear rate of γ ̇ = 1 s-1.