脂肪醇聚氧乙烯醚羧酸钠辅助测定疏水聚合物特性黏数

Determination of Intrinsic Viscosity of Hydrophobic Polymer Assisted by Fatty Alcohol Polyoxyethylene Ether Carboxylic Acid Sodium AEC-9Na

通过用毛细管法测定脂肪醇聚氧乙烯醚羧酸钠(AEC-9Na)对疏水缔合聚合物AP-P4在特性黏数的影响,当AEC-9Na的体积分数>40%时,能够准确测定不同质量浓度AP-P4的特性黏数,其特性黏数为1 000mL/g,说明体积分数为40%AEC-9Na可以屏蔽疏水基团的相互作用。用紫外法和荧光法测定AEC-9Na存在下的AP-P4吸光度,结果表明:随着AEC-9Na的体积分数不断增加,AP-P4紫外吸光度和荧光吸光度逐渐减小,体积分数>40%后,紫外和荧光吸光度基本保持不变。表明AEC-9Na可以屏蔽疏水基团的相互作用,从而可以测定疏水缔合聚合物的特性黏数。

By measuring the effect of fatty alcohol polyoxyethylene ether carboxylic acid sodium(AEC-9 Na)on the intrinsic viscosity of hydrophobically associating polymer AP-P4 through the capillary method,it was found that the intrinsic viscosity of AP-P4 at different mass concentrations can be accurately measured and its intrinsic viscosity is 1 000 mL/g when the volume fraction of AEC-9 Na is above 40%,which meant that AEC-9 Na can block the interaction of hydrophobic groups with a volume fraction of 40%.The absorbance of AP-P4 under AEC-9 Na was determined by UV and fluorescent spectroscopy.The results showed that as the volume fraction of AEC-9 Na increased,UV and fluorescence absorbance of AP-P4 decreased gradually.While the volume fraction was above 40%,UV and fluorescence absorbance remained almost unchanged.These results indicated that AEC-9 Na can block the interaction of hydrophobic groups so that the intrinsic viscosity of hydrophobically associating polymers can be measured.