表面黏度是指液体表面上单分子内层的二维剪切黏度。在具有分散相体系中，表面黏度是体系稳定的重要因素。
实验结果表明：超声处理使树脂的黏度和表面张力降低，RTM浸润性改善显著，从而提高了复合材料的力学性能。
The results show that ultrasonic treatment degrades the viscosity and surface tension of resin and improves RTM impregnation, which enhances the bend property of RTM composites.
但随着反应时间的增加，在岩石表面处酸液黏度增加，使得反应速率出现较大幅度的下降。
But along with the reaction, the viscosity of acid increased in the surface of rock, while a large scale of decline of reaction rates by contrast.
适当降低草甘膦药液的表面张力或增加其黏度均可提高其对杂草的防除效果。
Moderate reduction of surface tension or increase of the viscosity of glyphosate could increase inhibition rate of weeds.
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