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Thermal field‐flow fractionation (TFFF) coupled with multi‐angle laser light scattering (MALLS) is a promising quantitative method for determining the molecular‐weight distribution (MWD) of complex polymers and their aggregates. This paper describes the application of TFFF‐MALLS to linear polystyrene as well as highly cross‐linked microgel and sulfonated polystyrene samples. In addition, the chromatographic characterization of block copolymer micelles with different core chemistry is performed. The dependence of retention volume on the mass diffusion coefficient D and the thermal diffusion coefficient DT was confirmed. It is shown that DT, as predicted by theory, depends only on the solvent, being independent of both molecular weight and structure.
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Antonietti et al. (1995) studied this question.
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