TY - JOUR A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter A1 - Rikowski, E. T1 - Zur Charakterisierung von Si-Polymeren durch flüssigchromatographische Verfahren in Kopplung mit der MALDI-TOF-MS N2 - Summary. The coupling of the three liquid chromatographic modes with MALDI-TOF mass spectrometry is suitable for the determination of the molecular, functional, and chemical heterogeneities of Si polymers. Silsesquioxanes and siloxanes serve as examples for this method of structure identification. The substance specific construction of the SEC calibration curve by means of MALDI-MS is shown. Zusammenfassung. Die Kopplung der drei flüssigchromatographischen Modi mit MALDI-TOF-Massenspektrometrie ist zur Bestimmung der molekularen, funktionalen und chemischen Verteilungen von Si-Polymeren geeignet. Silsesquioxane und Siloxane dienen als Beispiele für diese Art der Strukturerkennung. Die substanzspezifische Konstruktion einer SEC-Eichkurve mit Hilfe der MALDI-MS wird gezeigt. KW - Si polymer characterization KW - LC/MALDI-TOF-MS PY - 1999 DO - https://doi.org/10.1007/PL00010162 SN - 0026-9247 SN - 1434-4475 VL - 130 IS - 1 SP - 163 EP - 174 PB - Springer CY - Wien AN - OPUS4-2163 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Much, Helmut T1 - Characterization of polyethers using different chromatographic techniques and MALDI-TOF-MS T2 - 19th International Symposium on Column Liquid Chromatography (HPLC ´95) CY - Innsbruck, Austria DA - 1995-05-28 PY - 1995 AN - OPUS4-3456 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Determination of functionality and molar mass distribution of aliphatic polyesters by orthogonal liquid chromatography, Part I: Off-line investigation of poly-(1,6-hexanediol adipates) PY - 1994 SN - 0148-3919 VL - 17 SP - 3069 EP - 3090 PB - Dekker CY - New York, NY AN - OPUS4-2139 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - New Results of Determination of Polymer Heterogeneity by Two-Dimensional Orthogonal Liquid Chromatography T2 - International GPC Symposium CY - Lake Buena Vista, FL, USA DA - 1994-06-05 PY - 1994 SP - 273 EP - 275 PB - Gordon and Breach CY - St. Helier, Jersey AN - OPUS4-2140 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wachsen, O. A1 - Reichert, K.H. A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Thermal decomposition of biodegradable polyesters - III. Studies on the mechanisms of thermal degradation of oligo-L-lactide using SEC, LACCC and MALDI-TOF-MS PY - 1997 SN - 0141-3910 SN - 1873-2321 VL - 55 SP - 225 EP - 231 PB - Applied Science Publ. CY - London AN - OPUS4-2154 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Czichocki, G. A1 - Heger, R. A1 - Goedel, W. A. A1 - Much, Helmut T1 - Liquid Chromatography of polyisoprenes - determination of critical composition using non protic binary and acidic ternary solvent mixtures N2 - Mixed solvent systems for the critical liquid chromatography of polyisoprenes are investigated. Under critical solvent conditions, the energetic and entropic interactions between the polymer and the stationary phase cancel each other, the free energy of interaction approaches zero and the retention time is independent of the polymer chain length. Critical conditions for polyisoprene-silica gel have been established for a non-protic binary solvent mixture [i-octane-tetrahydrofuran (THF); critical composition at 0.88% (v/v) of THF] and a ternary system containing an acidic component [i-octane-[0.5% (v/v) acetic acid in methyl-tert.butylether (MTBE)]; critical composition at 0.65% (v/v) of the acetic acid-MTBE mixture]. PY - 1997 DO - https://doi.org/10.1016/S0021-9673(97)00778-4 SN - 0021-9673 VL - 791 IS - 1 SP - 350 EP - 356 PB - Elsevier CY - Amsterdam AN - OPUS4-2157 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Determination of polymer heterogeneity by two-dimensional orthogonal liquid chromatography KW - Orthogonal chromatography KW - Size exclusion chromatography KW - Liquid adsorption chromatography at critical conditions KW - Matrix-assisted laser desorption ionization time-of-flight mass spectrometry KW - Polyester KW - Polyether PY - 1996 SN - 1023-666X SN - 1563-5341 VL - 2 SP - 221 EP - 235 PB - Gordon and Breach Publ. CY - Amsterdam AN - OPUS4-2146 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Leukel, J. A1 - Burchard, W. A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Mechanism of the anionic copolymerization of anhydride- cured epoxies-analysisted by matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF-MS) PY - 1996 SN - 1022-1336 SN - 1521-3927 VL - 17 SP - 359 EP - 366 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-2148 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Bestimmung der Polymerheterogenität durch Kopplung von HPLC und MALDI-TOF-MS KW - Zweidimensionale Flüssigchromatographie KW - Flugzeit-Massenspektrometrie KW - Synthetische Polymere PY - 1996 SN - 0016-3538 VL - 40 IS - 4 SP - 398 EP - 402 PB - GIT-Verlag CY - Darmstadt AN - OPUS4-2149 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter A1 - Wachsen, O. T1 - New aspects of determination of polymer heterogeneity by 2-dimensional orthogonal liquid chromatography and MALDI-TOF-MS PY - 1996 SN - 1022-1360 SN - 0258-0322 SN - 1521-3900 VL - 110 SP - 155 EP - 176 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-2150 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter ED - Günther, W. T1 - Strukturaufklärung von heterogenen Polymeren durch zweidimensionale Flüssigchromatographie und MALDI-TOF-Massenspektrometrie T2 - InCom '94 - International Symposium on Instrumentalized Analytical Chemistry and Computer Technology CY - Düsseldorf, Deutschland DA - 1994-03-14 PY - 1994 VL - 94 PB - InCom-Bureau CY - Düsseldorf AN - OPUS4-2195 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Polymer Characterization by Two-Dimensional HPLC and MALDI-TOF-MS T2 - 7th International Symposium on Polymer Analysis and Characterization (ISPAC) CY - Les Diablerets, Switzerland DA - 1994-05-24 PY - 1994 PB - Gordon and Breach CY - St. Helier, Jersey AN - OPUS4-2196 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Paulus, G. A1 - Resch, M. A1 - Schulz, Günter ED - Darms, R. ED - Suter, U. T1 - Polymer Characterization by MALDI-TOF-MS and Combination with HPLC T2 - 5th European Polymer Federation Symposium on Polymeric Materials (EPF) CY - Basel, Switzerland DA - 1994-10-09 PY - 1994 SN - 3-85739-297-5 SN - 0258-0322 VL - 5 PB - Hüthig & Wepf CY - Zug AN - OPUS4-2200 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schulz, Günter A1 - Krüger, Ralph-Peter A1 - Much, Helmut ED - Günther, W. T1 - Polymercharakterisierung durch MALDI-TOF-MS und Kopplung mit der HPLC T2 - InCom '95 - International Symposium on Instrumentalized Analytical Chemistry and Computer Technology CY - Düsseldorf, Germany DA - 1995-03-20 PY - 1995 CY - Moers AN - OPUS4-2201 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wachsen, O. A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter A1 - Reichert, K.H. T1 - Untersuchungen zur Charakterisierung des Abbaus von Polylactiden mittels 2D-HPLC und MALDI-TOF-MS T2 - Sitznung des Berliner Verband für Polymerforschung e.V. CY - Berlin DA - 1995-05-18 PY - 1995 CY - Berlin AN - OPUS4-2202 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kilz, P. A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter ED - Provder, T. T1 - Two-dimensional chromatography for the deformulation of complex copolymers PY - 1995 SN - 0-8412-3132-X N1 - Serientitel: Advances in chemistry series – Series title: Advances in chemistry series IS - 247 SP - 223 EP - 241 PB - American Chemical Society CY - Washington AN - OPUS4-2185 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter A1 - Rikowski, E. ED - Auner, N. T1 - Synthesis of Polyhedral Hexa-, Octa-, Deca- and Dodeca-Silsesquioxanes, Separation by NP-HPLC, SEC and LAC, Characterization by MALDI-TOF-MS KW - Silsesquioxanes KW - NP-HPLC KW - LAC KW - SEC KW - MALDI-TOF-MS PY - 2000 SN - 3-527-29854-1 SP - 545 ff. PB - Wiley-VCH CY - Weinheim AN - OPUS4-2187 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Much, Helmut A1 - Krüger, Ralph-Peter A1 - Schulz, Günter T1 - Investigation of Macromer Heterogeneity by Two-Dimensional HPLC and MALDI-TOF-MS T2 - 19th International Symposium on Column Liquid Chromatography CY - Innsbruck, Austria DA - 1995-05-28 PY - 1995 CY - Innsbruck AN - OPUS4-2204 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maier, B. A1 - Trathnigg, B. A1 - Much, Helmut A1 - Krüger, Ralph-Peter A1 - Berek, D. T1 - Characterization of polyethers using different chromatographic techniques and MALDI-TOF-MS PY - 1995 CY - Innsbruck AN - OPUS4-2205 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Reichert, K.H. A1 - Schulz, Günter A1 - Wachsen, O. T1 - Untersuchungen zur Charakterisierung des Polylactidabbaus mittels HPLC und MALDI-TOF-MS T2 - Präsentationsveranstaltung des Instituts für Angewandte Chemie Berlin-Adlershof e.V. CY - Berlin, Germany DA - 1995-09-26 PY - 1995 CY - Berlin AN - OPUS4-2206 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Investigation of Macromer Heterogeneity by 2D-HPLC and MALDI-TOF-MS T2 - Präsentationsveranstaltung des Instituts für Angewandte Chemie Berlin-Adlershof e.V. CY - Berlin, Germany DA - 1995-09-26 PY - 1995 CY - Berlin AN - OPUS4-2207 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -