TY - JOUR A1 - Weidner, Steffen A1 - Wolff, D. A1 - Springer, J. T1 - Phase Behaviour of Copolymers Containing Cholesterol and 4,4' Methoxybiphenyl as Mesogenic Group PY - 1996 SN - 0267-8292 SN - 1366-5855 VL - 20 IS - 5 SP - 587 EP - 593 PB - Taylor & Francis CY - London AN - OPUS4-11094 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - SFC of new liquid-crystalline cholesteryl esters T2 - InCom '96, International Symposium on Instrumentalized Analytical Chemistry and Computer Technology CY - Düsseldorf, Germany DA - 1996-03-25 PY - 1996 AN - OPUS4-11194 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen A1 - Kühn, Gerhard A1 - Just, Ulrich A1 - Werthmann, Barbara A1 - Decker, Renate A1 - Schwarz, Bärbel A1 - Borowski, Renate T1 - MALDI/MS - A New Technique in Characterizing Chemical Heterogeneity of Degradation Products of Poly(Ethylene Terephthalate)s T2 - International GPC Symposium '96 CY - San Diego, CA, USA DA - 1996-09-08 PY - 1996 SP - 632 EP - 651 CY - Milford, Mass. AN - OPUS4-11905 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weidner, Steffen A1 - Wolff, D. A1 - Springer, J. T1 - Influence of Chirality on Phase Behaviour of Copolymers Containing Cholesterol as Mesogenic Group PY - 1996 SN - 1022-1352 SN - 1521-3935 VL - 197 SP - 1337 EP - 1348 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-11091 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - Untersuchung von plasmamodifizierten Polymeren mit speziellen Analysenmethoden T2 - Abteilungsseminar, BAM, Abt. VI CY - Berlin, Germany DA - 1996-05-02 PY - 1996 AN - OPUS4-6411 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Weidner, Steffen T1 - MALDI - Untersuchung zur Oberflächenmodifizierung von Polymeren nach Plasmabehandlung T2 - 4. MALDI-Anwendertreffen (Shimadzu) CY - Duisburg, Germany DA - 1997-11-26 PY - 1997 AN - OPUS4-11280 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 - JOUR A1 - Weidner, Steffen A1 - Kühn, Gerhard A1 - Werthmann, Barbara A1 - Schröder, Hartmut A1 - Just, Ulrich A1 - Borowski, Renate A1 - Decker, Renate A1 - Schwarz, Bärbel A1 - Schmücking, I. A1 - Seifert, Ingetraut T1 - A new approach of characterizing the hydrolytic degradation of poly(ethylene terephthalate) by MALDI-MS N2 - The hydrolytic degradation of technical poly(ethylene terephthalate) (PET) was investigated by means of different methods such as size-exclusion chromatography (SEC), viscometry, light-scattering, thin-layer chromatography, end-group titration, and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). The long-term degradation was simulated by exposing PET filament yarns to aqueous neutral conditions at 90°C for up to 18 weeks. By means of MALDI-MS and thin-layer chromatography, the formation of different oligomers was obtained during polymer degradation. As expected, an ester scission process was found generating acid terminated oligomers (H-[GT]m-OH) and T-[GT]m-OH and ethylene glycol terminated oligomers (H-[GT]m-G), where G is an ethylene glycol unit and T is a terephthalic acid unit. Additionally, the scission of the ester bonds during the chemical treatment led to a strong decrease in the number of cyclic oligomers ([GT]m). The occurrence of di-acid terminated species demonstrated a high degree of degradation. PY - 1997 DO - https://doi.org/10.1002/(SICI)1099-0518(199708)35:11<2183::AID-POLA9>3.0.CO;2-Z SN - 0360-6376 SN - 0887-624X VL - 35 IS - 11 SP - 2183 EP - 2192 PB - Wiley CY - Hoboken, NJ AN - OPUS4-11357 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weidner, Steffen A1 - Wolff, D. A1 - Springer, J. T1 - Influence of Spacer Variation on Phase Behaviour of Liquid-Crystalline Copolymethacrylates containing Cholesterol and S-(-)-4,4'-chloropropionyl-oxybiphenyl PY - 1997 SN - 0267-8292 SN - 1366-5855 VL - 22 IS - 2 SP - 193 EP - 201 PB - Taylor & Francis CY - London AN - OPUS4-11096 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weidner, Steffen A1 - Kühn, Gerhard A1 - Roessner, D. A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang A1 - Lippitz, Andreas ED - Olefjord, I. ED - Nyborg, L. ED - Briggs, D. T1 - Changes in molecular weight distribution of polymers by plasma treatment T2 - 7th European Conference on Applications of Surface and Interface Analysis CY - Göteborg, Sweden DA - 1997-06-16 PY - 1997 SN - 0-471-97827-2 SP - 795 EP - 799 PB - Wiley CY - Chichester AN - OPUS4-6997 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weidner, Steffen A1 - Decker, R. A1 - Holländer, A. T1 - Derivatization of Double Bonds investigated by Matrix-assisted Laser Desorption/Ionization Mass Spectrometry PY - 1997 SN - 0951-4198 SN - 1097-0231 VL - 11 SP - 914 EP - 918 PB - Wiley CY - Chichester AN - OPUS4-11097 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Friedrich, Jörg Florian A1 - Schulz, Eckhard A1 - Weidner, Steffen A1 - Kühn, Gerhard T1 - Verbesserungen der mechanischen Festigkeiten von Faser-Polymer-Verbundwerkstoffen durch Vorbehandlung der Fasern im Niederdruckplasma T2 - Vortragsbände des 8. Internationalen Techtextil-Symposiums 1997 CY - Frankfurt am Main, Deutschland DA - 1997-05-12 PY - 1997 VL - 8 SP - 1(?) EP - 16(?) PB - Messe Frankfurt CY - Frankfurt am Main AN - OPUS4-7287 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weidner, Steffen A1 - Holländer, A. A1 - Kühn, Gerhard T1 - Matrix-assisted Laser Desorption/Ionization Mass Spectrometry of C36- Alkane degradated by Vacuum Ultraviolet Radiation PY - 1997 SN - 0951-4198 SN - 1097-0231 VL - 11 SP - 447 EP - 450 PB - Wiley CY - Chichester AN - OPUS4-11095 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Koprinarov, Ivaylo A1 - Weidner, Steffen A1 - Kühn, Gerhard ED - Schindel-Bidinelli, E. T1 - Umweltfreundliches Metallisieren von Kunststoffen durch Plasmavorbehandlung in einem geschlossenen Reaktor T2 - Swissbonding 97 ; 11. Internationales Symposium Klebtechnik und Umwelt ; 11th International Symposium Bonding and Sealing Technology CY - Rapperswil, Schweiz DA - 1997-05-26 PY - 1997 SP - 1(?) EP - 3(?) PB - SWIBOTECH CY - Rorbas AN - OPUS4-6994 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Koprinarov, Ivaylo A1 - Weidner, Steffen A1 - Kühn, Gerhard ED - Nowack, H. T1 - Wechselwirkungen zwischen plasmamodifizierten Polymeroberflächen und Metallen T2 - 5. Internationale Fachtagung - ND-Plasma-Technologie CY - Duisburg, Deutschland DA - 1997-09-22 PY - 1997 VL - 5 SP - 1(?) EP - 17(?) PB - Print-Service CY - Mülheim AN - OPUS4-6995 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Friedrich, Jörg Florian A1 - Schulz, Eckhard A1 - Weidner, Steffen A1 - Kühn, Gerhard T1 - Improvement in Mechanical Strength of Fibre Polymer Composites by Fibre Pretreatment in Low-Pressure Plasmas T2 - Vortragsbände des 8. Internationalen Techtextil-Symposiums 1997 CY - Frankfurt am Main, Deutschland DA - 1997-05-12 PY - 1997 SP - 1(?) EP - 16(?) PB - Messe Frankfurt CY - Frankfurt am Main AN - OPUS4-7286 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weidner, Steffen A1 - Kühn, Gerhard A1 - Friedrich, Jörg Florian T1 - Infrared-Matrix-assisted Laser Desorption/Ionization and Infrared-Laser Desorption/Ionization Investigations of Synthetic Polymers PY - 1998 SN - 0951-4198 SN - 1097-0231 VL - 12 SP - 1373 EP - 1381 PB - Wiley CY - Chichester AN - OPUS4-6988 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Just, Ulrich A1 - Werthmann, Barbara A1 - Weidner, Steffen T1 - Referenzmaterialien für die Polymeranalytik - Verfahren zur Charakterisierung und Bewertung PY - 1998 SN - 0943-6677 VL - 49 IS - 6 SP - 223 EP - 228 PB - Rubikon CY - Gaiberg bei Heidelberg AN - OPUS4-11261 LA - deu 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 - JOUR A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Geng, Sh. A1 - Koprinarov, Ivaylo A1 - Kühn, Gerhard A1 - Weidner, Steffen T1 - Modelling plasma-induced reactions on polymer surfaces using aliphatic self-assembling and LB layers PY - 1998 SN - 0257-8972 VL - 98 SP - 1132 EP - 1141 PB - Elsevier Science CY - Lausanne AN - OPUS4-6999 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -