Rheological Properties of Waterborne Polyurethane Paints

Huan-huan Zhang; Ran Niu; Xin-bing Guan; Dong-hua Xu; Tong-fei Shi

doi:10.1007/s10118-015-1718-8

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Rheological Properties of Waterborne Polyurethane Paints

PAPER | Updated：2021-06-21

- Rheological Properties of Waterborne Polyurethane Paints
- Chinese Journal of Polymer Science Vol. 33, Issue 12, Pages: 1750-1756(2015)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.University of Chinese Academy of Sciences, Beijing 100049, China
  c.Shanghai WaterBased Chemical Co. Ltd, Shanghai 200072, China
- Author bio：
  
  **Dong-hua Xu (许东华), E-mail: dhxu@ciac.ac.cn
  Tong-fei Shi (石彤非), E-mail: tfshi@ciac.ac.cn
- Funds：
- DOI：10.1007/s10118-015-1718-8
  CLC：
- Received：15 June 2015，
  
  Revised：2015-07-23，
  
  Accepted：23 August 2015，
  
  Published：2015-12
- Accepted：
Scan QR Code
Huan-huan Zhang, Ran Niu, Xin-bing Guan, et al. Rheological Properties of Waterborne Polyurethane Paints[J]. Chinese Journal of Polymer Science, 2015, 33(12): 1750-1756.
DOI：

Huan-huan Zhang, Ran Niu, Xin-bing Guan, et al. Rheological Properties of Waterborne Polyurethane Paints[J]. Chinese Journal of Polymer Science, 2015, 33(12): 1750-1756. DOI： 10.1007/s10118-015-1718-8.

摘要

Abstract

The rheological properties of two specific waterborne polyurethane (PU) paints were studied by both macrorheological and microrheological methods. During the macrorheological measurement on a rotary rheometer

evaporation of solvent cannot be totally excluded

which has an influence on the reliability of rheological results. So

the linear oscillatory frequency sweep results (storage and loss modulus versus frequency) and steady shear results (viscosity versus shear rate) got from the rotary rheometer measurement are only used for qualitative analysis. As the evaporation of solvent can be neglected during microrheological measurements on a diffusing wave spectroscope (DWS)

the results of storage modulus (

′) and loss modulus (

″) versus frequency are more credible than the results obtained from the rotary rheometer measurement. Thus

the results of

′ and

″ versus frequency from DWS measurements are used for quantitative analysis in this work. The

′ for both of the waterborne PU paints are larger than

″ at low frequency and that is opposite at high frequency in the experimental angular frequency range. The values of modulus at same frequency and viscosity at low shear rate for the two PU paints have apparent difference

which determines the difference of their application.

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