6533b824fe1ef96bd127fe8c

RESEARCH PRODUCT

Packings of an unidimensional regular pore structure as model packings in size-exclusion and inverse size-exclusion chromatography

subject

description

Using porous aluminas and aluminosilicates with a regular and well-defined pore structure an attempt was made to correlate the SEC data of polystyrenes with established theoretical models. The pore structure of the two types of packings was extensively characterized by means of transmission and scanning electron microscopy, nitrogen sorption and mercury porosimetry. The SEC distribution coefficients measured experimentally were correlated with the distribution coefficients calculated from the theoretical models for flexible polymers. A good correlation was observed for the packing of the simplest pore morphology, but remarkable deviations appeared for the materials with a more complex pore structure. The results of correlation were considered in terms of their applicability to estimate pore morphology from SEC measurements.