TY - CONF A1 - Weidner, Steffen T1 - UV- und IR-MALDI-TOF-MS zur Bestimmung von Molmasse und chemischer Heterogenität von synthetischen Polymeren T2 - 4. Deutsches Bruker Daltonik MALDI-TOF-MS Anwendertreffen CY - Fulda, Germany DA - 1999-04-15 PY - 1999 AN - OPUS4-11282 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - MALDI-MS zur Charakterisierung der Oligomeren nach hydrolytischem und plasmachemischem Abbau von Polymeren T2 - I. BAM-Kolloquium zu "Anwendung von MALDI-MS zur Charakterisierung von synthetischen Polymeren" CY - Berlin, Germany DA - 1997-06-02 PY - 1997 AN - OPUS4-11276 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - MALDI-TOF-MS of low-molar mass polyethylene and waxes T2 - 49th Conference of the American Society of Mass Spectrometry CY - Chicago, IL, USA DA - 2001-05-25 PY - 2001 AN - OPUS4-11302 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - Erste Untersuchungen zur Infrarot-MALDI-MS von Polymeren T2 - II. BAM-Kolloquium zu "Anwendung von MALDI-MS zur Charakterisierung von synthetischen Polymeren" CY - Berlin, Germany DA - 1998-05-04 PY - 1998 AN - OPUS4-11281 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - MALDI-TOF-MS zur Analytik von synthetischen Polymeren T2 - Seminar zur Makromolekularen Chemie im SS 1999, TU Berlin, AK Prof. Springer CY - Berlin, Germany DA - 1999-11-13 PY - 1999 AN - OPUS4-11300 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - Mechanism of homogeneously catalyzed polymerization of liquid-crystalline sidegroup monomers investigated by means of MALDI-TOF-MS (No. 433) T2 - 219th ACS National Meeting CY - San Francisco, CA, USA DA - 2000-03-26 PY - 2000 AN - OPUS4-11314 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - Modifizierung plasmabehandelter Polyolefinoberflächen mit kovalent gebundenen Funktionsmolekülen T2 - Workshop "Medicine meets Material", TEMA Berlin, Institut für Nichtmetallische Werkstoffe der TU Berlin CY - Berlin, Germany DA - 1999-01-29 PY - 1999 AN - OPUS4-11312 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - Determination of molecular mass and molecular mass distribution of polymers by matrixassisted laser desorption/ionization - time of fightmass spectrometry (MALDI TOF MS) T2 - ISO TC 61/SC 5 Meeting CY - Yokohama, Japan DA - 2006-09-18 PY - 2006 AN - OPUS4-13822 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - MALDI-TOF mass spectrometry for the analysis of synthetic polymers T2 - eingelad. Vortrag im National Institute for Advanced Industrial Science and Technology (AIST) CY - Tsukuba, Japan DA - 2006-09-14 PY - 2006 AN - OPUS4-13827 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - MALDI-ToF mass spectrometry for the characterization of biobased polymers suitable for depollution N2 - In this work, bio-based polymers were synthesized and designed as polymers phases for adsorption of a variety of pollutants from aqueous solutions. The obtained adsorption results showed that the integration of bio-sourced synthons generate attractive hydrophilicity, and wettability of the resulting adsorbent phase. Such polymers phases enable stronger interactions with the organic and inorganic pollutants in water. A wide variety of different bio-based polymers structures (e. g. poly(ethersulfones, poly(etherphosphines or poly(etherpyridines) with different functional groups were successfully designed in order to adapt chemical structure to different pollutants type and matrice nature. In order to characterize and to determine the correlation between polymer structures and nature of interaction with pollutants, different analytical technics (NMR, GPC, ATG, DSC, Mass spectrometry) were successfully used. Amongst them, MALDI TOF mass spectrometry plays a superior role since this technique enables the simultaneous determination of the polymer structure, polymer end groups and molecular weight. This work focusses on the characterization of synthesized polymers. The chemical structure of the repeating unit, the nature of the end groups, as well as the molecular weight, which are all important for the specific interactions of the polymer with the pollutants were clearly determined and suggestions to improve these interactions by changing the synthetic pathway could be given. T2 - 12. Journees maghreb-europe. Matériaux et Applications aux Dispositifs et Capteurs CY - Monastir, Tunisia DA - 08.11.2022 KW - MALDI TOF MS KW - Biobased polymers KW - Depollution PY - 2022 AN - OPUS4-56237 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -