Abstract
Low solubility polymers, poly(ethylene terephthalate), PET and poly(butylene terephthalate), PBT were mutually separated at ambient temperature with help of a novel method, liquid chromatography under limiting conditions of desorption, LC LCD. The results demonstrate high selectivity of LC LCD, which enabled discrimination of macromolecules of well similar chemical structure, irrespectively of their molar mass. Above poly(terephthalate)s were also readily base-line separated from the aliphatic biodegradable polyesters poly( l-lactic acid) and poly(butylene adipate). The experimentally feasible LC LCD method produces narrow, focused peaks of polymers eluted behind the adsorption promoting barrier of appropriate liquid. This merit of LC LCD enables discrimination and identification of minor macromolecular constituents of multicomponent polymers and facilitates the application of method as an integral part of two-dimensional liquid chromatography for comprehensive molecular characterization of complex polymer systems.
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