Abstract
Complex copolymer mixtures can be directly analyzed via multidimensional chromatographic techniques after successful synthesis. High-performance liquid chromatography coupled to size exclusion chromatography (LC/SEC) revealed detailed information on the chemical composition, polymeric structure, and molar mass distribution of copolymer mixtures, in particular of symmetric and nonsymmetric α-TEO-ω-PEO telechelic PIB copolymers. A series of azide/alkyne “click” reactions after living polymerization reactions were used to prepare the either symmetric or nonsymmetric PIB–PEO-based triblock copolymers of the general structure (PEOn–PIB–PEOm BCPs (with n = 3; m = 3, 12, or 17)). In order to demonstrate the efficiency of the “click” reaction and thus the purity of the final triblock copolymers, the critical conditions of the PIB-homopolymers (Mn = 3–30 kg mol–1) in the isocratic elution mode (LCCC) were investigated. Thus, it was possible to separate the final polymers from their intermediates using a reversed-p...
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