Hc. Lee et al., CHARACTERIZATION OF BINARY POLYMER MIXTURES BY SIZE-EXCLUSION CHROMATOGRAPHY WITH MULTIPLE DETECTION, Polymer, 36(11), 1995, pp. 2215-2218
We demonstrated that both components of binary polymer mixtures of pol
ystyrene and poly(methyl methacrylate) can be characterized simultaneo
usly by size exclusion chromatography equipped with multiple detectors
. In this analysis scheme, the individual peaks of the two components
are separated from the overlapped chromatogram by simultaneously solvi
ng the response signal intensities from two concentration detectors, i
.e. a refractive-index detector and an ultra-violet/visible absorption
detector. Then the absolute molecular-weight distribution of each com
ponent is obtained from the response of a light-scattering detector in
conjunction with universal calibration. This method can be applied to
binary mixture systems the two components of which have a distinguish
able difference in refractive index as well as in absorptivity.