聚酰胺的数均分子量可用酸碱滴定的方法分析试样所含羧基和氨基的数量来计算。由于端基的相对数量很少,现有的分析方法每次需用试样几克,最少的也要0.1克,不能适应许多实际工作的要求.本工作试用微量分析技术作聚酰胺的端基滴定,每次分析仅需试样10—20毫克。 The number average molecular weight of the polyamide can be calculated by acid-base titration analysis of the number of carboxyl and amino groups contained in the sample. Due to the relatively small number of end groups, the current analytical methods require a few grams of each sample, at least 0.1 grams, can not meet the requirements of many practical work.This work to use trace analysis techniques for the polyamide end groups Titration, each sample only 10-20 mg.