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| 延展黏度对涂布过程的影响及其测量方法 |
| Extensional Viscosity: Influence on Coating Process and Main Measurement Method |
| 收稿日期： |
| DOI：10.11980/j.issn.0254-508X.2012.07.012 |
| 关键词: 延展黏度 增稠剂 涂布运行性能 延展性能 |
| Key Words:extensional viscosity thickener coating runnability extensional property |
| 基金项目: |
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| 摘要:介绍了延展流动和延展黏度的概念、延展黏度与剪切黏度的关系以及增稠剂对延展黏度的影响。分别阐述了延展黏度对刮刀涂布、MSP涂布和帘式涂布运行过程的影响，同时列举了检测涂料延展黏度的方法，重点介绍了流道收缩法和毛细管拉伸裂断法两种延展黏度的测量方法。 |
| Abstract:The concepts of extensional flow and extensional viscosity were introduced in this paper, the relationship between extensional viscosity and shear viscosity and the influence of thickener on extensional viscosity were discussed, also the importance of extensional viscosity in blade coating, MSP coating and curtain coating was discussed respectively. Finally the measurements of the variation trend of extensional viscosity were introduced, the methods of Converging Channel-Flow and Capillary Breakup were emphasized. |
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