东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2004, Vol. 25 ›› Issue (6): 570-573.DOI: -

• 论著 • 上一篇    下一篇

熔体流变特性的测定方法

刘润藻;吴铿;赵勇;姜茂发   

  1. 东北大学材料与冶金学院;北京科技大学冶金与生态工程学院;北京科技大学冶金与生态工程学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2004-06-15 发布日期:2013-06-24
  • 通讯作者: Wu, K.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50034010)

Measurement of rheologic characteristics of melts

Liu, Run-Zao (1); Wu, Keng (2); Zhao, Yong (2); Jian, Mao-Fa (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China; (2) Sch. of Metall. and Ecological Eng., Univ. Sci. and Technol. Beijing, Beijing 100083, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-06-15 Published:2013-06-24
  • Contact: Wu, K.
  • About author:-
  • Supported by:
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摘要： 为了测定熔体的流变特性,将普通的旋转粘度仪改造成转速可变的·用其测定了不同粘度的标准油,给出了仪器的重现性误差和试验总误差,试验总误差为测量牛顿流体时所容许的最大偏差·通过分析试验数据,确定试验中容许忽略屈服应力对粘性因子影响的最大误差值·进而,给出了判定熔体是否为非牛顿流体和确定非牛顿流体中是否有屈服应力的方法,其结果为深入研究熔体流变特性奠定了必要的基础·

关键词: 流变特性, 非牛顿流体, 测定方法, 可变转速粘度仪, 误差分析

Abstract: A conventional rotary viscometer was restructured available to variable speeds to measure the rheological characteristics of melts, e.g., the oil viscosities with different standard grades. The reproducibility error of this viscometer and the total error of measurements, i.e., the maximal permissible measuring error of Newtonian fluid in measurement process are given. The maximal permissible error caused by neglecting the effect of yield stress on viscous factor was determined through the analysis of measured data. An approach to determine whether a melt is non-Newtonian fluid and whether there is a yield stress in the non-Newtonian fluid was further given. The results provide a necessary basis for further research on the rheologic characteristics of melts.

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