Mg-Al MMH对除虫脲水悬浮剂流变性的影响

研究了Mg-Al型混合金属氢氧化物(MMH)质量分数(w)、温度和无机电解质对除虫脲水悬浮剂流变性的影响, 并采用Herschel-Buckley模型对流变曲线进行拟合. 实验结果表明, 稠度指数(KH)及屈服值(τH)均随w的增大而增大, w越大, 体系假塑性越明显, 且当w达到一定值后体系产生正触变性; 温度升高, KH和τH增大, 但不影响体系“剪切变稀”的假塑性特征和正触变性; 不同浓度的电解质对体系KH和τH的影响程度不同, 对于相同浓度的NaCl 和CaCl2, CaCl2对体系的影响更为显著, 但电解质的加入不改变体系“剪切变稀”的假塑性特征及正触变性.

Influence of Mg-Al MMH on the Rheology of Diflubenzuron SC

The influences of mass fractions of Mg-Al MMH(w), temperature and electrolytes(NaCl, CaCl2 )on the rheology and thixotropy of Diflubenzuron SC were studied in this paper. It was found that the rheological behavior of Diflubenzuron SC coincided with the Herschel-Buckley rheological model, and the SC showed the property of rheogram “shear-thinning”of the pseudo-plasticity. Consistency index KH and yield value τH increased with the increase of w, and the SC displayed positive thixotropy when w reached a certain value; with the increase of temperature, KH and τH increased, but the property of rheogram “shear-thinning”of the pseudo-plasticity and positive thixotropy of the system were not changed. The electrolytes with various concentration exerted different effects on KH and τH, and the influences of CaCl2 were more significant than NaCl at the same concentration. The property of rheogram “shear-thinning” of the pseudo-plasticity and positive thixotropy of the SC added with electrolytes were not changed.