液体含氟橡胶流变性能的研究

刘煜; 李吉明; 齐士成*

北京化工大学学报(自然科学版) ›› 2011, Vol. 38 ›› Issue (2) : 48-51.

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北京化工大学学报(自然科学版) ›› 2011, Vol. 38 ›› Issue (2) : 48-51.
材料科学与工程

液体含氟橡胶流变性能的研究

  • 刘煜; 李吉明; 齐士成*
作者信息 +

Rheological properties of liquid fluororubbers

  • LIU Yu; LI JiMing; QI ShiCheng
Author information +
文章历史 +

摘要

采用DV-Ⅱ+Pro型旋转黏度计分别测试了液体氟碳、氟醚及氟硅橡胶的流变性能。结果表明,在30~45 ℃的范围内,分子量对端羧基液体氟碳橡胶的黏度影响较大;3种液体含氟橡胶在较宽的剪切范围内均为牛顿流体,黏度均随温度的升高而降低,在低温范围内,端羧基液体氟碳橡胶的黏度远远大于液体氟醚橡胶,当温度达到60 ℃以上时,二者的黏度值相差不大,均在20 Pa·sg附近,液体氟硅橡胶的黏度很低,稳定值在5 Pa·s;黏流活化能从大到小依次为端羧基液体氟碳橡胶,液体氟醚橡胶,液体氟硅橡胶。

Abstract

The rheological properties of a liquid fluoroelastomer with carboxyl end groups, a liquid fluoroether rubber and a liquid fluorosilicone rubber have been characterized using a rotational viscometer. The results showed that the molecular weight had a significant impact on the viscosity of the liquid fluoroelastomer in the temperature range 30-45 ℃. The three liquid fluororubbers were Newtonian fluids over a wide range of shear rate and their viscosities decreased with increasing temperature. The viscosity of the liquid fluoroelastomer was much larger than that of the liquid fluoroether rubber at low temperatures, whereas their viscosities were identical above 60 ℃. The flow activation energy of the liquid fluoroelastomer was the highest of the three liquid fluororubbers studied.

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刘煜; 李吉明; 齐士成*. 液体含氟橡胶流变性能的研究[J]. 北京化工大学学报(自然科学版), 2011, 38(2): 48-51
LIU Yu; LI JiMing; QI ShiCheng. Rheological properties of liquid fluororubbers[J]. Journal of Beijing University of Chemical Technology, 2011, 38(2): 48-51

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