Chromatographic Mass of a Polymer and Its Use for Determining the Molecular Mass Characteristics

摘要

The method has been proposed for determining the molecular characteristics of flexible-chain polymers that obey the universal calibration principle and for which there are available experimental data on the intrinsic viscosity.This method is based on studying the dependence of the hydrodynamic volume M_n[eta],M_w[eta],M_z[eta],and M_(eta)[eta]on parameter a in the Mark-Kuhn-Houwink equation.It has been found that,for parameter a varying in the range from 0.5 to 0.8,the weight-average hydrodynamic volume M_w[eta]remains almost unchanged.This allows estimation of M_w based on a single intrinsic viscosity value.The notion of the chromatographic mass of a polymer is advanced and is employed for determining other molecular mass parameters.