TY - CONF A1 - Schönhals, Andreas T1 - Molecular dynamics of liquid-crystalline copolymethacrylates containing cholesterol as mesogenic groups T2 - Fall Meeting American Chemical Society CY - New Orleans, LA, USA DA - 1999-08-22 PY - 1999 AN - OPUS4-11311 LA - eng 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 - Rittig, F. T1 - Characterization of Polyamides using new combined techniques T2 - Unesco-IUPAC-Polymer Convention CY - Stellenbosch, South Africa DA - 2004-04-05 PY - 2004 AN - OPUS4-11141 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Just, Ulrich T1 - BAM-Certified Polymer Reference Materials (CRM) T2 - ISPAC 2002, 15th Intrnational Symposium on Polymer Analysis and Characterization CY - Enschede, Netherlands DA - 2002-06-17 PY - 2002 AN - OPUS4-11210 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Just, Ulrich T1 - Referenzmaterialien für die Polymeranalytik - Verfahren zur Charakterisierung und Bewertung T2 - XX. Hamburger Makromolekulares Symposium CY - Hamburg, Germany DA - 1997-09-22 PY - 1997 AN - OPUS4-11203 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 - Kühn, Gerhard T1 - MALDI-TOF-MS zur Polymercharakterisierung T2 - Berliner Polymerentage 1997 CY - Berlin, Germany DA - 1997-10-09 PY - 1997 AN - OPUS4-11126 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Just, Ulrich T1 - BAM-Certified Polymer Reference Materials (CRM) T2 - Polydays 2002 CY - Berlin, Germany DA - 2002-09-30 PY - 2002 AN - OPUS4-11211 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Just, Ulrich T1 - Polymer-Referenzmaterialien T2 - Analytica 2000 CY - Munich, Germany DA - 2000-04-11 PY - 2000 AN - OPUS4-11209 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gross, J.H. T1 - FD-MS von Polyethylenoligomeren: Einfluß des elektrischen Feldes und der Emitter-Temperatur auf Dehydrogenierung und C-C-Bindungsspaltungen T2 - 33. Diskussionstagung der Deutschen Gesellschaft für Massenspektrometrie (DGMS) CY - Berlin, Germany DA - 2000-02-27 PY - 2000 AN - OPUS4-11313 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Sötebier, Carina T1 - Characterization of silver nanoparticles using asymmetric-flow field-flow fractionation combined with inductively coupled plasma mass spectrometry T2 - Anwendertreffen "Plasmaspektrometrie" CY - Hamburg, Germany DA - 2014-02-11 PY - 2014 AN - OPUS4-30243 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Falkenhagen, Jana T1 - Characterization of copolyesters by coupling of liquid chromatography with MALDI and ESI mass spectrometry T2 - National Institute of Standards & Technology Polymer Mass Spectrometry Workshop CY - Gaithersburg, MD, USA DA - 2005-11-09 PY - 2005 AN - OPUS4-11544 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Falkenhagen, Jana T1 - Polymer characterization by combination of chromatographic techniques coupled with MALDI and ESI mass spectrometry T2 - Analytica Conference 2006 CY - Munich, Germany DA - 2006-04-25 PY - 2006 AN - OPUS4-12384 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Falkenhagen, Jana T1 - Coupling of liquid-chromatographic, spectroscopic and spectrometric techniques for polymer characterization T2 - Polydays CY - Berlin, Germany DA - 2006-10-04 PY - 2006 AN - OPUS4-12377 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Falkenhagen, Jana T1 - Challenges of sec and the necessity of round robin tests N2 - Size exclusion chromatography (SEC) is still the method of choice for determining the molar mass and molar mass distribution of macromolecules. From the distribution curve molar mass averages and the oligomer content (percentage of peak area smaller than 1000 g/mol and 500 g/mol) of polymers can be derived. The determination of oligomer content is important, because it is often used in regulatory contexts as a measure of small, mobile and potentially more toxic parts of the polymer. Polymer regulations are of increasing political and societal importance. Regulations often strive for narrow limits. But SEC has rather large error margins of 10-20% for the molar mass determination performed in different laboratories or on different instruments. These variances are well known to all experts and users and have been investigated in several round robin tests in the past. These resulted in DIN and ISO standards which, in our opinion, no longer meet today's requirements. Gaps have been identified that require further harmonization. Different polymer types or classes require different methods. On the other hand, as far as we know, the margins of error in determining oligomer content have not yet been investigated. It is expected that the variation will be rather high. This is because it depends on many factors related to the experimental conditions (column sets used, solvent, temperatures, sample preparation) on the one hand, and the data evaluation mechanisms (choice of baseline and peak limits) on the other. In order to actually measure the error margins and to support this with actual data a round robin test has been performed from June to November 2024 with approx. 40 participating laboratories. Three different solvents were selected, namely THF, DMAc or DMF and water. The samples were selected taking into account a wide range of practical aspects far from narrowly distributed standards: e.g higher distribution range, reduced solubility, included side components, copolymers and dispersions with gel content. In this contribution we will present the detailed concept of this round robin test and impressions T2 - 2025 Polymer Separations GNT meeting, Dow CY - Online meeting DA - 25.02.2025 KW - Polymers KW - Size exclusion chromatography KW - REACH PY - 2025 AN - OPUS4-63314 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Falkenhagen, Jana A1 - Fink, Friedrich T1 - Biobased and biodegradable polymers - sustainability and circular economy N2 - The presentation shows recent results on the synthesis and modification of environmentally relevant polymers based on renewable resources and the associated development of robust, high quality analytical methods. The first topic presents analytical results for star-shaped polylactides with different degrees of functionalisation. It is shown how liquid chromatography and mass spectrometry methods complement each other in a proven way to obtain accurate molar masses and to quantify chemically heterogeneous species. The second part presents an approach to incorporate lignin into epoxy matrices to obtain covalently adaptable epoxy networks that can be reprocessed and reused. T2 - 11th International Symposium on the Separation and Characterization of Natural and Synthetic Macromolecules CY - Amsterdam, Netherlands DA - 21.01.2025 KW - Polylactides KW - Ligninbased thermosets KW - MALDI-TOF-MS KW - Gradient elution liquid adsorption chromatography KW - Atomic force spectroscopy KW - FT-IR PY - 2025 AN - OPUS4-62532 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter T1 - Beiträge zur Charakterisierung von Polylactiden durch Kopplung von HPLC-Trennmethoden mit der MALDI-TOF-MS T2 - Analytica Conference 2002 CY - Munich, Germany DA - 2002-04-23 PY - 2002 AN - OPUS4-3386 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter T1 - Hyphenated liquid-chromatographic, spectroscopic and spectrometric techniques for polymer characterization T2 - Polymerwerkstoffe 2006 CY - Halle (Saale), Germany DA - 2006-09-27 PY - 2006 AN - OPUS4-13808 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - Sample spot heterogeneity investigated by MALDI-imaging mass spectrometry T2 - 18th International Mass Spectrometry Conference CY - Bremen, Germany DA - 2009-08-30 PY - 2009 AN - OPUS4-19375 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Fandrich, Nick T1 - Characterisation of new blocky copolymers of N-vinyl pyrrolidone and vinyl acetate by using of liquid chromatography and hyphenated techniques T2 - ExTech-HTC-Public Safety and Security Symposia CY - Bruges, Belgium DA - 2008-01-30 PY - 2008 AN - OPUS4-16398 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -