阳离子聚丙烯酰胺P(AM-DAC)阳离子度的测定

Determination of cationic degree in cationic polyacrylamide P( AM-DAC)

以实验室自制阳离子聚丙烯酰胺P（AM—DAC）为样品，分别用沉淀滴定法和胶体滴定法对其阳离子度进行测定，并用数理统计方法对2种方法进行分析比较，实验结果表明，沉淀滴定法和胶体滴定法都可以准确测定产品的FEl离子度，但胶体滴定法比沉淀滴定法更具有稳定性和准确性。实验还研究了不同滴定因素对胶体滴定法的影响，表明PH值在1．75～2．25范围内，滴定速度在0．01～0．05mL／S范围内，滴定溶液质量浓度选在1×10-4～2×10-4g／mL范围内，所测定的阳离子度最接近于理论值。

The precipitation titration method and colloid titration method are respectively used to determine the cationic degree of cationic polyacrylamides P （AM-DAC） samples that are self-prepared in the laboratory. And mathematical method is used to comparatively analyze the two methods. It is found that both precipitation titration and colloid titration can accurately measure cationic degree, but the colloid titration method is more stable and accurate than precipitation titration method. The influence of different factors on the colloid titration are also analyzed in experiments, and the experimental results show that the measured value of cationic degree is the closest to the theoretical value when the pH value is within the range of 1.75 to 2.2, the titration rate in the range of 0.01 mL/s to 0.05 mL/s, and the titrimetric solution concentration in the range of 1×10-4～2×10-4g/mL.