Caractérisation de copolymères à blocs à base de poly(oxyde d’éthylène) et de polystyrène par des techniques de chromatographie liquide avancées

Differentes techniques de chromatographie liquide des polymeres ont ete etudiees selon leur principe d’elution et le comportement conformationnel des polymeres suscite au sein de la phase stationnaire. De part leur capacite a caracteriser des copolymeres a blocs, la Chromatographie Liquide aux Conditions Critiques (LC CC) et la Chromatographie Liquide aux Conditions Limites de Desorption (LC LCD) ont ete utilisees pour determiner la composition chimique de copolymeres a blocs a base de poly(oxyde d’ethylene) et de polystyrene. La LC LCD s’est distinguee par sa capacite a separer de maniere efficace les copolymeres a blocs de leurs homopolymeres parents. Cette methode chromatographique a ensuite ete optimisee afin d’etre appliquee a une plus large gamme de masses molaires.

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