傳統(tǒng)的旋轉(zhuǎn)流變儀是在理想流動(dòng)條件(黏度流動(dòng))下工作的,使用板椎板或同心圓筒表征復(fù)雜材料,尤其在線性黏彈區(qū)域更好但往往復(fù)雜流體在這種條件下Z難測(cè)量的測(cè)試或滑動(dòng)過(guò)程中采樣工具界面上的沉降有明顯的效果,且能夠減少儀器的操作范圍
Traditional rotational rheometry has been dea領(lǐng) with ideal flow conditions (viscometric flows) using plate, cone-plate or concentric cylinder geometries to characterize complex materials, preferably in the linear viscoelastic region. Complex fluids, however are often difficult to measure under these conditions. Sedimentation during testing or slippage at the sample-tool interface have a significant effect on the results and reduce the operation range of the instruments. ?Furthermore do viscoelastic flows by no means represent the real flow situation in batch or continuous reactors and processing machines during mixing and/or incorporation of additives, etc. For example, in order to simulate and to understand the gelatinization of starch, a mixing element is used as the standard geometry to avoid sett領(lǐng) of the non soluble starch particles since the early days of rheological testing. Discovery 流變儀
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