Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-929 Beitrag zu einem Sammelband Friedrich, Jörg Florian; Retzko, Iris; Kühn, Gerhard; Unger, Wolfgang; Lippitz, Andreas Mittal, K. Metal doped plasma polymer films Utrecht VSP 2001 Metallized plastics 7 7 90-6764-340-8 7th Symposium on Metallized Plastics Newark, NJ, USA 1999-12-02 1999-12-03 117 142 2016-02-19 OPUS4-1466 Zeitschriftenartikel Friedrich, Jörg Florian; Kühn, Gerhard; Schulz, Ulrich; Jansen, Kirsten; Möller, B.; Fischer, S. Fluorination of Polymer Surfaces Weinheim Wiley-VCH Verl. 2002 Vakuum in Forschung und Praxis 14 5 285 290 2016-02-19 OPUS4-2057 Zeitschriftenartikel Fritz, Andreas; Schönhals, Andreas; Mix, Renate; Kühn, Gerhard; Friedrich, Jörg Florian Dielectric spectroscopy of plasma copolymers of the system allyl alcohol/alkene Polymers synthesized with plasma techniques are very interesting materials for electronic, optic, and bio compatible applications. Thin films of plasma polymers shows a good adhesion to metals, glass, or other polymers. But the supramolecular structure, the durability, and the chemical and mechanical behavior of these polymers is poorly understood. Therefore dielectric investigations are carried out to study the dynamic behavior of the plasma polymers. As polymer system allyl alcohol/alkene is chosen to get polymers with a defined concentration of hydroxyl groups. The dielectric investigations shows several relaxation processes and a dependency of the dielectric parameters from the ratio of allyl alcohol in the polymer is observed. This results indicated that the alkene monomers were assembled continuous into the polymer matrix. Bad Honnef Deutsche Physikalische Gesellschaft 2002 Verhandlungen der Deutschen Physikalischen Gesellschaft Frühjahrstagung des Arbeitskreises Festkörperphysik bei der DPG Regensburg, Deutschland 2002-03-11 2002-03-15 CPP 4.7 424 2016-02-19 OPUS4-2058 Zeitschriftenartikel Fritz, Andreas; Schönhals, Andreas; Mix, Renate; Kühn, Gerhard; Friedrich, Jörg Florian Dielectric spectroscopy of plasma copolymers or the system allyl alcohol/alkene Bad Honnef Deutsche Physikalische Gesellschaft 2002 Verhandlungen der Deutschen Physikalischen Gesellschaft Frühjahrstagung des Arbeitskreises Festkörperphysik bei der DPG Regensburg, Germany 2002-03-11 2002-03-15 CPP 4.7 424 2016-02-19 OPUS4-1537 Zeitschriftenartikel Schartel, Bernhard; Kühn, Gerhard; Mix, Renate; Friedrich, Jörg Florian Surface Controlled Fire Retardancy of Polymers Using Plasma Polymerisation Communication: Fire retardant coatings are deposited on polyamide-66 using plasma polymerisation. Chemical composition and thickness of deposits are adjusted varying the plasma treatment based on hexamethydisiloxane mixed with oxygen. The fire retardancy performances are evaluated using a cone calorimeter. The correlation between fire retardancy and thickness as well as chemical composition is discussed. Weinheim Wiley-VCH Verl. 2002 Macromolecular materials and engineering 287 9 579 582 10.1002/1439-2054(20020901)287:9<579::AID-MAME579>3.0.CO;2-6 2016-02-19 OPUS4-2612 Beitrag zu einem Tagungsband Meyer-Plath, Asmus; Mix, Renate; Kühn, Gerhard; Friedrich, Jörg Florian d'Agostino, R. The Potential of Surface Radicals for Polymer Functionalization Bari Dep. of Chemistry, Univ. International Union of Pure and Applied Chemistry 2003 Proceedings of the 16th International Symposium on Plasma Chemistry 16th International Symposium on Plasma Chemistry (ISPC-16) Taormina, Italy 2003-06-22 2003-06-26 CD-ROM 2016-02-19 OPUS4-2703 Zeitschriftenartikel Friedrich, Jörg Florian; Mix, Renate; Kühn, Gerhard Functional groups bearing plasma homo and copolymer layers as adhesion promoters in metal-polymer composites Functional groups bearing monomers were pulsed plasma polymerised with a degree of retained functional groups of 55–91%. The following functional groups could be produced at a maximum of: 30 OH, 18 NH2, and 24 COOH per 100 C atoms. A plasma-initiated radical copolymerisation could also be realised using the functional group bearing monomers as a source of functionalities, olefins as ‘chain-extenders’ and dienes as ‘chemical cross-linkers’. The peel strengths of Al layers on such plasma polymers were correlated to the type and density of functional groups. Lausanne Elsevier Science 2003 Surface and coatings technology 174-175 811 815 10.1016/S0257-8972(03)00350-5 2016-02-19 OPUS4-2704 Zeitschriftenartikel Friedrich, Jörg Florian; Kühn, Gerhard; Mix, Renate; Fritz, Andreas; Schönhals, Andreas Polymer surface modification with monofunctional groups of variable types and densities The retention of chemical structure and functional groups during pulsed plasma polymerization was used for producing adhesion-promoting plasma polymer layers with high concentrations of exclusively one kind of functional groups, such as OH, NH2, or COOH. The maximum content of functional groups was 31 OH using allyl alcohol, 18 NH2 using allylamine, or 24 COOH per 100 C atoms using acrylic acid. To vary the density of functional groups, chemical co-polymerization with ethylene as 'chain-extending' co-monomer, or butadiene as 'chemical crosslinker' was initiated in the pulsed plasma. The composition of these co-polymers was investigated by XPS and IR spectroscopy. The concentrations of functional groups were measured by derivatizing with fluorine-containing reagents and using XPS. A set of plasma parameters was found to be a good compromise between a high number of functional groups and complete insolubility in water, ethanol or THF,which is needed for further chemical processing. Here, these monotype-functionalized surfaces were used in metal-polymer systems as adhesion-promoting interlayers to examine the influence of type and density of functional groups on adhesion. As expected, COOH- and OH-group-terminated interlayers showed maximum peel strengths to evaporated aluminium layers. The adhesion increased linearly with the number of OH groups to a maximum at about 27 OH per 100 C atoms. Higher concentrations of OH groups did not increase the peel strength further. Utrecht VNU Science Press 2003 Journal of adhesion science and technology 17 12 1591 1617 10.1163/156856103322396695 2016-02-19 OPUS4-2705 Zeitschriftenartikel Friedrich, Jörg Florian; Unger, Wolfgang; Lippitz, Andreas; Koprinarov, Ivaylo; Ghode, Archana; Geng, Sh.; Kühn, Gerhard Plasma-based introduction of monosort functional groups of different type and density onto polymer surfaces. Part 1: Behaviour of polymers exposed to oxygen plasma Several approaches were investigated to produce monosort functionalized polymer surfaces with a high density and homogeneity of functional groups: (i) Plasma oxidation followed by wet-chemical reduction, (ii) formation of radicals and grafting on of functional group carrying molecules, (iii) plasma bromination followed by (iv) Williamson or Gabriel-like synthesis of spacer molecules, and (v) a pulsed plasma polymerization of functional groups bearing monomers or (vi) their copolymerisation with other comonomers. The formation of hydroxyl (OH), primary amino (NH2), and carboxyl (COOH) groups was studied in detail. The oxygen plasma treatment (i) in a low-pressure non-isothermal glow discharge results in the formation of a wide variety of O functional groups, polymer degradation and crosslinking. Low power densities and short exposure times (0.1 to 2 s) are required to functionalize a surface while preserving the original polymer structure. Carbonate, ester, and aromatic groups are rapidly degraded by an oxygen plasma treatment leading to scissions of polymer backbones and loss in molecular weight. Also the formation of macrocycles and C=C bonds was observed in a region of around 4 nm in depth. The investigated polymers could be classified by their degradation behaviour on exposure to the oxygen plasma.___TAGSTART___BR___TAGEND___ In order to maximize the process selectivity for OH groups, the variety of oxygen functionalities formed by the oxygen plasma was wet-chemically reduced by diborane, vitridetrade (Na complex), and LiAlH4. Typical yields were 9 to 14 OH groups per 100 carbon atoms.___TAGSTART___BR___TAGEND___ Plasma bromination (iii) (40 Br per 100 C atoms) of polymers, followed by grafting of spacer molecules (iv), has been proved to be a highly selective reaction.___TAGSTART___BR___TAGEND___ Another way to produce high densities of monosort functionalities was the pulsed plasma polymerization of functional group bearing monomers such as allylamine, allylalcohol or acrylic acid (v). The retention of chemical structure and functional groups during plasma polymerization was achieved by using low power densities and the pulsed plasma technique. The maximum yields were 30 OH, 18 NH2, and 24 COOH groups per 100 C atoms. To vary the density of functional groups a chemical copolymerization with ''chain-extending'' comonomers such as butadiene and ethylene was initiated in the pulsed plasma (vi). Additionally, the often-observed post-plasma oxidations of such layers initiated by reaction of trapped radicals with oxygen from the air were successfully suppressed by using NO gas as radical quencher. New York, NY North-Holland International Conference on Composite Interfaces 2003 Composite interfaces : proceedings 10 2-3 139 171 10.1163/156855403765826865 2016-02-19 OPUS4-2706 Zeitschriftenartikel Friedrich, Jörg Florian; Mix, Renate; Kühn, Gerhard; Retzko, Iris; Schönhals, Andreas; Unger, Wolfgang Plasma-based introduction of monosort functional groups of different type and density onto polymer surfaces. Part 2: Pulsed plasma polymerization This new functionalization method consists of the deposition of very thin plasma polymer layers (20 to 100 nm) of functional group bearing monomers in pulsed plasma. With allylalcohol, a maximum of 30 OH groups per 100 C atoms was measured with a selectivity of about 90% and a significant stability at long-time exposure to air. Allylamine was used to produce primary amino groups, with a maximum of 18 NH2 groups per 100 C atoms. Side reactions were observed during the storage in air, such as oxidation of the amino groups. Carboxylic groups could be produced using acrylic acid with a maximum concentration of 24 COOH groups per 100 C atoms. The most prominent side reaction was the decarbonylation/ decarboxylation of the acid group during plasma deposition.___TAGSTART___BR___TAGEND___ The variation of the density of functional groups using the pulsed-plasma polymerization of functional-group-bearing monomers was possible by the chemically-initiated radical copolymerization with either a chain-extending monomer, such as ethylene, or a cross linker, such as butadiene, in plasma. The density of functional groups could be adjusted continuously (0 to 30 OH, 0 to 18 NH2 and 0 to 24 COOH groups per 100 C atoms).___TAGSTART___BR___TAGEND___ The successful application of these densely functionalized polymer surfaces for producing biocompatible surfaces and for use in metal–polymer composites is proposed. New York, NY North-Holland International Conference on Composite Interfaces 2003 Composite interfaces : proceedings 10 2-3 173 223 10.1163/156855403765826874 2016-02-19