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首页> 外文会议>Symposium on Pesticide Formulations and Application Systems: A New Century for Agricultural Formulations, Twenty First Volume, Oct 24-26, 2000, Orlando, Florida >The Physical Chemistry of Water Dispersible Granules, Part Ⅱ: The Influence of Dispersant Molecular Weight and Paste Rheology on the Physical Properties of Extruded WDGs
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The Physical Chemistry of Water Dispersible Granules, Part Ⅱ: The Influence of Dispersant Molecular Weight and Paste Rheology on the Physical Properties of Extruded WDGs

机译：水分散性颗粒的物理化学，第二部分：分散剂分子量和糊状流变学对挤出WDG物理性能的影响

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摘要

The molecular weight distribution and the degree of sulfonation of Kraft lignin dispersants are used to determine performance plateau regions for the most favorable physical properties of WDG formulations produced by low pressure extrusion. Special emphasis is placed on the preparation of extruder feedstock pastes and on the related Theological properties of such pastes. Their ideal water requirement was determined by torque rheometry and other methods such as yield by deformation. A model study containing blends of high and low degree of sulfonation Kraft lignin dispersants with correspondingly high and low molecular weight fractions demonstrates the existence of such performance plateau regions which permit the selection of a final formulation with a broad spectrum of desirable physical properties. Porosity data are utilized to further demonstrate performance differences within the described platform regions.
机译：牛皮纸木质素分散剂的分子量分布和磺化度用于确定性能低压区，该低压区是由低压挤出生产的WDG配方最有利的物理性能。特别强调了挤出机原料浆料的制备以及此类浆料的相关流变学特性。它们的理想需水量是通过扭矩流变法和其他方法（如变形屈服）确定的。包含高和低磺化硫酸盐木质素分散剂与相应的高和低分子量部分的共混物的模型研究表明，存在这种性能平稳区，可以选择具有广谱所需物理性质的最终制剂。孔隙率数据被用来进一步证明所述平台区域内的性能差异。

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