适宜
发表于 2025-3-25 04:34:04
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instate
发表于 2025-3-25 07:41:16
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Lice692
发表于 2025-3-25 12:09:27
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ANN
发表于 2025-3-25 18:11:47
Capillary Rheometry,tively simple in that, if a steady viscometric flow is assumed within the constant circular section tubing, it is generally very easy to derive equations from elementary constitutive equations which yield the velocity profile and pressure drop within the pipe. We shall discover that for polymer melt
STING
发表于 2025-3-25 21:47:25
Slit Rheometry,the die as a function of flow rate. Wall shear stress is calculated from the pressure gradient and shear rate from the volumetric flow rate. Finally, the viscosity is determined by the ratio of shear stress to shear rate.
缺陷
发表于 2025-3-26 02:46:55
Converging Dies,ribe it, the same is not yet true of flow in convergences where the extensional strain rate becomes significant compared to the wall shearrate. Various methods of describing the convergent flow behaviour of polymeric liquids in dies and in other regimes have formed the basis of recent reviews. (see
他很灵活
发表于 2025-3-26 08:13:41
Recoverable Elastic Strain and Swelling Ratio,essed condition. Thus one sees a general elastic recovery. The term ‘recoverable strain’ is usually used more restrictively. Suppose a sample is undergoing a steady shear flow at shear rate. γ, where the first normal stress difference is N. and the shear stress is σ. If the shear stress is annihilat
Haphazard
发表于 2025-3-26 08:34:19
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leniency
发表于 2025-3-26 16:25:54
Computer Control and Data Processing in Extrusion Rheometers,chnology to enhance the efficiency and effectiveness of extrusion rheometers. We shall not deal in depth with those modern extrusion rheometers which are fully instrumented, since they are described elsewhere in this volume. However, users of these instruments may find our observations to be of valu
安装
发表于 2025-3-26 18:16:55
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