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A STUDY OF THE UPTAKE AND GELATION REACTIONS OF CR(III) OLIGOMERS WITH POLYACRYLAMIDE

机译:CR(III)低聚物与聚丙烯酰胺的吸收和凝胶化反应的研究

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The reaction rates of Cr(III) oligomers with partially hydrolyzed (PAAm) polyacrylamide were measured. The oligomers were prepared in relatively pure form using liquid chromatography, allowed to react with polymer, quenched, and then separated using equilibrium dialysis. In the pH range of 4-5, Cr(III) concentrations in the range of 8-30 ppm and polymer concentrations in the range of 4000-20,000 ppm, reaction rates increased with increasing oligomer size, concentration, and pH. Gelation rates determined using rheological measurements were found to follow closely the Cr(III) reaction rates. (C) 1997 John Wiley & Sons, Inc. [References: 16]
机译:测量了Cr(III)低聚物与部分水解(PAAm)聚丙烯酰胺的反应速率。使用液相色谱法以相对纯的形式制备低聚物,使其与聚合物反应,淬灭,然后使用平衡透析分离。在4-5的pH范围内,Cr(III)的浓度在8-30 ppm的范围内,聚合物的浓度在4000-20,000 ppm的范围内,反应速率随低聚物尺寸,浓度和pH值的增加而增加。发现使用流变学测量确定的胶凝速率与Cr(III)反应速率密切相关。 (C)1997 John Wiley&Sons,Inc. [参考:16]

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