title: Characterization of poly(2-oxazoline) homo- and copolymers by liquid chromatography at critical conditions.
abstract: In this study liquid chromatography at critical conditions for poly(2-ethyl-2-oxazoline)s (PEtOx) has been performed for the first time in order to analyze functional PEtOx homopolymers and block copolymers. Besides the verification of the critical point of adsorption with two series of ester end group functionalized PEtOx homopolymers, to evaluate the effect of both the chain length dependence and the end group polarity, using a cyano column with a solvent combination of 2-propanol and water, also two-dimensional liquid chromatography (2D-LC) has been applied for a poly(2-oxazoline) block copolymer. The combined characterization techniques provided further information about the polymerization procedure with regard to the formation of side-products by separation of the block copolymer from the corresponding homopolymer impurities. In addition, hyphenation of LCCC with MALDI-TOF MS and ESI-Q-TOF tandem mass spectrometry verified the obtained results.
authors: Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich-Schiller-University Jena, Jena, Germany.
authors: Anja
authors: A
authors: Baumgaertel
authors: Christine
authors: C
authors: Weber
authors: Nicole
authors: N
authors: Fritz
authors: Grit
authors: G
authors: Festag
authors: Esra
authors: E
authors: Altuntaş
authors: Kristian
authors: K
authors: Kempe
authors: Richard
authors: R
authors: Hoogenboom
authors: Ulrich S
authors: US
authors: Schubert
mesh_terms: D019840:2-Propanol / Q000737:chemistry; D000327:Adsorption; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D011073:Polyamines / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D053719:Tandem Mass Spectrometry; D014867:Water / Q000737:chemistry
chemical_list: D011073:Polyamines; D011108:Polymers; C117403:poly(2-methyl-2-oxazoline); D014867:Water; D019840:2-Propanol