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Characterization of polyoxyalkylene block copolymers by combination of different chromatographic techniques and MALDI-TOF-MS |
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| Authors: | Muhammad Imran Malik Bernd Trathnigg Karin Bartl Robert Saf |
| Institution: | a Institute of Chemistry, Karl-Franzens-University, Heinrichstrasse 28, A-8010 Graz, Austria b NAWI Graz, Central Polymer Laboratories (CePoL), Heinrichstrasse 28 and Stremayrgasse 16, A-8010 Graz, Austria c Institute for Chemistry and Technology of Materials (ICTM), Graz University of Technology, Stremayrgasse 16, A-8010 Graz, Austria |
| Abstract: | Polyoxyalkylene diblock copolymers (consisting of PEO as hydrophilic block and PBO or PHO as hydrophobic block) are characterized by combination of two dimensional liquid chromatography and MALDI-TOF-MS. Liquid chromatography under critical conditions (LCCC) is used as first dimension and fractions are collected, mobile phase evaporated and diluted in the mobile phase used in the second dimension (SEC, LCCC or LAC). This two-dimensional chromatography in combination of MALDI-TOF-MS gives information about purity of reaction products, presence of the byproducts, chemical composition and molar mass distribution of all the products. |
| Keywords: | Two dimensional chromatography (2D-LC) Liquid chromatography under critical conditions (LCCC) Matrix-assisted laser desorption ionization time-of-flight mass spectroscopy (MALDI-TOF-MS) Polyoxyalkylene block copolymers |
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