Search Results - (Author, Cooperation:M. M. Pohl)
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1Latest Papers from Table of Contents or Articles in PressR. V. Jagadeesh ; A. E. Surkus ; H. Junge ; M. M. Pohl ; J. Radnik ; J. Rabeah ; H. Huan ; V. Schunemann ; A. Bruckner ; M. Beller
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-11-30Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Aniline Compounds/*chemical synthesis ; Catalysis ; Ferric Compounds/*chemistry ; HydrogenationPublished by: -
2Latest Papers from Table of Contents or Articles in PressRyabchuk, P., Agostini, G., Pohl, M.-M., Lund, H., Agapova, A., Junge, H., Junge, K., Beller, M.
American Association for the Advancement of Science (AAAS)
Published 2018Staff ViewPublication Date: 2018-06-09Publisher: American Association for the Advancement of Science (AAAS)Electronic ISSN: 2375-2548Topics: Natural Sciences in GeneralPublished by: -
3Articles: DFG German National LicensesStaff View
ISSN: 0887-6266Keywords: Chemistry ; Polymer and Materials ScienceSource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyPhysicsNotes: This article deals with the microlevel structure of the electronically conductive polymer, polyaniline, on the basis of the conducting islands model of Epstein et al. The paper presents, for the first time, TEM pictures of the microlevel structure of heavily doped polyaniline, possibly showing the conducting islands in the material. © 1994 John Wiley & Sons, Inc.Additional Material: 3 Ill.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 0323-7648Keywords: Chemistry ; Polymer and Materials ScienceSource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyPhysicsDescription / Table of Contents: By transmission electron microscopy, globular structures were observed on the fracture surface of the phenolic resin matrix. From water diffusion experiments the existence of a layer between the globules with a lower network density can be deduced. When the resin is modified by NBR or by tung oil combined with tricresyl phosphate, two separated phases are indicated by dynamic mechanical analysis, by thermally stimulated depolarization measurements, and by TEM.Notes: Auf Matrixbruchflächen werden mittels Transmissionselektronenmikroskopie globulare Strukturen beobachtet. Aus Untersuchungen zur Wasserdiffusion kann auf eine Zwischenschicht mit geringerer Vernetzungsdichte geschlossen werden. Ist die Harzmatrix mit NBR-Kautschuk oder mit Holzöl in Kombination mit Tricresylphosphat modifiziert, so weisen die dynamisch-mechanische Analyse, Messungen der thermisch stimulierten Depolarisation und TEM-Untersuchungen auf zwei separierte Phasen hin.Additional Material: 11 Ill.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 0323-7648Keywords: Chemistry ; Polymer and Materials ScienceSource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyPhysicsDescription / Table of Contents: Unter besonderer Berücksichtigung des Spacereffektes wird die Immobilisierung von Ti-Mg-ZIEGLER-NATTA-Katalysatoren mittels polymerer Grignardverbindungen beschrieben. In Gegenwart von Wasserstoff als Molmassenregler werden die Katalysatoren zur Homopolymerisation von Ethylen bei 85°C und 6 bar eingesetzt. Die Katalysatoraktivität ist in allen Fällen um ein Mehrfaches höher, wenn eine MgCl2-Phase im Verlauf der Katalysatorsynthese auf der Trägeroberfläche ausgebildet wird. Die Aussage wird durch REM- und TEM-Aufnahmen belegt.Notes: The immobilization of Ti-Mg catalysts via polymeric Grignards on crosslinked polystyrenes has been achieved in the presence of methylene spacers of varying length. The resulting catalysts are tested in the homopolymerization of ethylene in a suspension process at 85°C and a total pressure of 6 bar. Hydrogen has been used as molecular weight controlling agent. The polymerization activity of the catalysts is significantly enhanced when a MgCl2 phase is generated in the course of catalyst preparation. The results are supported by SEM and TEM techniques.Additional Material: 8 Ill.Type of Medium: Electronic ResourceURL: