Examination of the Universality of the Calibration Curve of Size Exclusion Chromatography by Using Polymers Having Complex Macromolecular Architectures

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Abstract
The validity of the universal calibration curve (UCC) in size exclusion chromatography (SEC) was tested by using polymers having complex macromolecular architectures such as miktoarm stars ( w -stars) (PS) 2 PI, (PS) 2 PBd, (PI) 3 PS, (PS-PI) 2 (PI-PS) 2 , (PS)(PI)(PBd), (PS)(PI)(PBd)(P4MeS), H-shaped (PI) 2 PS(PI) 2 , and ~ -shaped (PS)(PI)PI(PS)(PI), as well as a model linear tetrablock copolymer of the PS-PI-PS-PI type, where PS is polystyrene, PBd polybutadiene, PI polyisoprene, and P4MeS is poly(4-methyl styrene). It was found that the universality of the relation of log(M[ m ]) vs. peak elution volume (V e ), where M is molecular weight and [ m ] is intrinsic viscosity, is valid even for these complex molecules. The determination of the molecular weight of a polymer by using the UCC is very sensitive to the molecular and compositional homogeneity of the sample.

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