在线流变仪应用文章ON-LINE RHEOLOGY WITH EXTENDED SPECTRUM

Abstract：A new on-line capillary rheometer has been introducedwhich incorporates three capillaries with parallel feedcontrol through a modified gear pump. To control thespeed of the gear pump, a new digital servo-drive sys-tem provides a freely adjustable speed range from 0.1-100 rpm. This provides the means to measure the vis-cosity function over a shear rate range of seven decades.The rise of fielt temperature due to dissipation is cor-rected by a new mathematical model, to be described.