TY - JOUR A1 - Griebenow, Werner A1 - Werthmann, Barbara A1 - Kelm, Jürgen T1 - Beobachtungen über das Trocknungsverhalten bedruckter und lackierter Papiere - Einfluß der Oberflächenbeschaffenheit PY - 1982 SN - 0025-5300 VL - 24 IS - 3 SP - 86 EP - 89 PB - Hanser CY - München AN - OPUS4-36200 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Herrmann, E. C. A1 - Hoyer, G.-A. A1 - Kelm, Jürgen T1 - Chemical shifts of fluorobiphenyls with regard to substituent parameters - V PY - 1982 SN - 1873-3557 - 1386-1425 - 0584-8539 VL - 38A IS - 10 SP - 1057 EP - 1058 PB - Elsevier Science CY - Amsterdam AN - OPUS4-36204 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Groß, Dieter A1 - Kelm, Jürgen T1 - Hochauflösende Festkörper-13C-NMR-Spektrometrie an Elastomeren PY - 1985 SN - 0368-4768 VL - 38 IS - 12 SP - 1089 EP - 1092 PB - Verl. für Radio-Foto-Kino-Technik CY - Berlin AN - OPUS4-34085 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kelm, Jürgen A1 - Groß, Dieter T1 - Fluorine NMR - a method for investigating the decomposition of vulcanization accelerators PY - 1985 SN - 0035-9475 SN - 1943-4804 VL - 58 IS - 12 SP - 37 EP - 44 CY - Lancaster, Pa. AN - OPUS4-34086 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Kelm, Jürgen T1 - High Resolution NMR Spectroscopy for the Determination of Elastomers, Blends and Thermoplastic Elastomers Carbon and Proton NMR Spectra Catalogue N2 - Der Bericht umfasst ca. 50 wichtige kommerzielle Kautschuke mit den zugehörigen Vulkanisaten, eine Reihe von Elastomer Blends sowie thermische Elastomere. Enthalten sind die Protonen- und Kohlenstoff-Lösungsspektren der löslichen Kautschuke und die Kohlenstoff-Festkörperspektren der unlöslichen Elastomere. N2 - NMR is a powerful method for structure elucidation and determination of polymers in solution. Soluble polymers can be studied by high resolution techniques - just äs small molecules - provided there is sufficient segmental motion to average out some of the linebroadening effects. The resonance lines remain broader, however, which can result in peak overlapping, especially for proton spectra. Carbon NMR is favoured in this field because of the larger spectral range and the feasibility of getting single lines by proton broad-band decoupling. One particulariy important use of NMR is the determination ofthe microstructure of the polymer chain. The application of high resolution NMR to solid polymers was not possible until the development of techniques like magic angle spinning, high power proton decoupling and cross polarization. The linebroadening effects in thermoplastic and duroplastic polymers, however, are only reduced to some extent. The spectra show relatively broad lines, with typical linewidths of 100 - 500 Hz, which are roughly 10 to 100 times larger than in the liquid state. Different from thermoplastic and duroplastic polymers the spectra of elastomers have a much better resolution if the measurements are performed well above the glass transition temperature. This condition is fulfilled at room temperature for many elastomers. Above Tg linebroadening effects are averaged out by segmental motions, comparable to the liquid phase. By raising the temperature the resolution can be increased further which especially improves the spectra of elastomers with relatively high glass transition temperatures. Filiers can influence the linewidth of the spectra. The effect is twofold. First, the filier particies, e.g. carbon black, introduce microscopic inhohogeneities by susceptibility variations. Second, the molecular mobility ofthe polymer chains is reduced. Both effects can be averaged out to a great extent by magic angle spinning and high power decoupling, however. Therefore the filier has no detrimental influence on the resolution of the solid-state elastomer spectra. As a consequence, no decomposition procedures are necessary prior to the NMR investigation. The sample can be measured in its original molecular state. This was the starting point for a thorough and comprehensive investigation of filled elastomers using the solid state technique in order to find out the possibilities and limits. The experiment tumed out to be very suecessfül. This lead us to the idea to put all the spectra together in form of a spectra catalogue.The collection contains the most important Standard and special commercial rubber types. In order to complement the solid state NMR part two chapters on blends and thermoplastic elastomers are added. Proton and carbon solution spectra of the raw rubbers are also included. Especially important is the interpretation ofthe spectra, in order not to display only "fingerprints". T3 - BAM Forschungsberichtreihe - 213 PY - 1995 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-2378 SN - 978-3-89429-975-4 SN - 0938-5533 VL - 213 SP - 1 EP - 167 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-237 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kelm, Jürgen A1 - Leisen, J. A1 - Breidt, J. T1 - 1H NMR Relaxation Studies of Cured Natural Rubbers with different Carbon Black Fillers KW - NMR KW - Rubber PY - 1999 SN - 0035-9475 SN - 1943-4804 VL - 72 IS - 1 SP - 1 EP - 14 CY - Lancaster, Pa. AN - OPUS4-809 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bovtun, Viktor Petrovic A1 - Stark, Wolfgang A1 - Kelm, Jürgen A1 - Porokhonskyy, V. A1 - Yakimenko, Y. T1 - Microwave Dielectric Properties of Rubber Compounds Undergoing Vulcanisation - Part 1. Natural rubber with and without carbon black filler KW - Dielectric parameters KW - Microwave methods KW - Vulcanisation KW - Elastomers KW - Monitoring PY - 2000 SN - 0948-3276 SN - 0022-9520 PB - Hüthig CY - Heidelberg AN - OPUS4-1062 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Stark, Wolfgang A1 - Döring, Joachim A1 - Kelm, Jürgen T1 - Ultraschall on-line Prozesskontrolle bei der Vulkanisation KW - Prozesskontrolle KW - Vulkanisation KW - Ultraschall KW - Sensoren KW - Schubmodul KW - Verlustmodul PY - 2000 SN - 0948-3276 SN - 0022-9520 SP - 9 Seiten PB - Hüthig CY - Heidelberg AN - OPUS4-997 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kelm, Jürgen A1 - Stark, Wolfgang A1 - Bovtun, V. A1 - Borisov, V. A1 - Yakimenko, Y. T1 - Investigation of Crosslinking Process in Thermosets and Elastomers by Microwave Methods - Basic Study for the Monitoring Method Development KW - Dielectric parameters KW - Microwave methods KW - Crosslinking KW - Cure KW - Vulcanisation KW - Thermosets KW - Elastomers KW - Monitoring PY - 2000 SN - 0025-5300 PB - Carl Hanser Verlag CY - München AN - OPUS4-1053 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kelm, Jürgen A1 - Kühn, H. A1 - Klein, M. A1 - Wiesmath, A. A1 - Demco, D.E. A1 - Blümich, B. A1 - Gold, P.W. T1 - The NMR-MOUSE: quality control of elastomers KW - NMR-MOUSE KW - Double-quantum NMR KW - Quality control KW - Elastomers PY - 2001 SN - 1090-7807 SN - 0022-2364 VL - 19 SP - 497 EP - 499 PB - Elsevier CY - San Diego, Calif. AN - OPUS4-1034 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -