概述为了克服应用 Mark—Houwink—Sak- urada(MHS)公式的粘度法测定低分子量的聚合物分子量的困难,我们推荐 Dondos-Benoit 关系式[η]~(-1)=-A_2+A_1M~(-1/2),对于一些聚合物一溶剂体系,给出了大量公式中的参数A:和A:值。此外,还提出了用MHS常数K和a计算上述参数的方法。 Overview To overcome the difficulty in determining the molecular weight of low molecular weight polymers using the viscosity method of the Mark-Houwink-Sakura equation (MHS), we propose the Dondos-Benoit relationship [η] -1 = - A_2 + A_1M ~ -1/2), for some polymer-solvent systems, a number of parameters A: and A: values ​​are given in the equations. In addition, methods for calculating these parameters using the MHS constants K and a are also proposed.