醇醚型表面活性剂疏水基和分子量的测定

Determination of Molecular Weight and Hydrophobic Groups of Alkyl Polyoxyethylene Ether Surfactants by NMR Method

用13C－NMR技术测定了醇醚型表面活性剂疏水基R的平均碳数、环氧乙烷平均加合数和平均分子量。并用实例说明了测量方法与步骤。最后列出了不同试样的分析结果，并与色谱联合'H－NMR法测得的结果进行了比较，得到了满意的结果．

Average molecular weight and hydrophobic groups of alkyl polyoxyethylene ether surfactants were de-terminated by 13C-NMR methcd in the paper. We can get simultaneously both average carbon number of hydropho-bic groups R and means additive number of ethylene oxide from 13C-NMR spectra first,then calculates averagemolecular weight from molecular formula. Analytical method and steps aer specified using an example. Finally,analyti-cal results of some different samples are listed and combining 'H-NMR method. It is satisfied with the results.