Abstract
Series of polythiiranes with pendant Oxyethylene groups havebeen characterised. Size Exclusion Chromatography (S.E.C.) analysis of polymerswith such polar groups needs some precautions. Accurate measurement of dn/dcis used in order to check the amount of recovery of the injected samples.Polymers with short side chains are normally eluted, but an irreversible adsorptionoccurs for long side chains. There appears to be an intermediate situationfor which adsorption is reversible and produces an important dependence ofelution volume on injected concentration. Using a combined Light Scattering, a Viscometric detector, and additionaloff-line Dynamic Light Scattering (D.L.S.) measurements, it was possible tostudy, more completely, the relationship between size and molecular weightfor such polymers. When some of these polymers do not exhibit any adsorptionphenomenon, universal calibration is observed and a constant correction factoris available, allowing the conversion of relative molecular weights into absolutemolecular weights.
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