TY - JOUR A1 - Friedrich, Jörg Florian A1 - Geng, Sh. A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Erdmann, J. A1 - Gorsler, H.-V. T1 - Plasma functionalization and reorientation of macromolecules at polymer surfaces JF - Surface and coatings technology KW - Plasma KW - Polymer KW - Monolayer KW - Einschichtsystem KW - NEXAFS KW - Spektroskopie KW - Oberflächenanalyse PY - 1995 SN - 0257-8972 VL - 74-75 SP - 664 EP - 669 PB - Elsevier Science CY - Lausanne AN - OPUS4-627 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Koprinarov, Ivaylo A1 - Ghode, Archana A1 - Geng, Sh. A1 - Kühn, Gerhard T1 - Plasma-based introduction of monosort functional groups of different type and density onto polymer surfaces. Part 1: Behaviour of polymers exposed to oxygen plasma JF - Composite interfaces : proceedings N2 - 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. PY - 2003 DO - https://doi.org/10.1163/156855403765826865 VL - 10 IS - 2-3 SP - 139 EP - 171 PB - North-Holland CY - New York, NY AN - OPUS4-2705 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Geng, Sh. A1 - Friedrich, Jörg Florian A1 - Gähde, J. A1 - Guo, L. T1 - Surface-Enhanced Infrared Absorption (SEIRA) and Its Use in analysis of Plasma-Modified Surface JF - Journal of applied polymer science KW - Plasma KW - IR KW - Surface-enhanced infrared absorption (SEIRA) KW - Surface modification PY - 1999 SN - 0021-8995 SN - 1097-4628 VL - 71 SP - 1231 EP - 1237 PB - Wiley InterScience CY - Hoboken, NJ AN - OPUS4-6985 LA - eng 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 JF - Surface and coatings technology 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 - TY - JOUR A1 - Friedrich, Jörg Florian A1 - Wigant, L. A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Geng, Sh. A1 - Erdmann, J. A1 - Gorsler, H.-V. T1 - Neue Erkenntnisse zur Plasmamodifizierung von Polymeroberflächen JF - Wissenschaftliche Beiträge / Technische Fachhochschule Wildau PY - 1995 SN - 0949-8214 VL - 1 SP - 36 EP - 42 PB - Technische Fachhochschule CY - Wildau AN - OPUS4-7011 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Friedrich, Jörg Florian A1 - Wigant, L. A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Weidner, Steffen A1 - Kühn, Gerhard A1 - Geng, Sh. A1 - Erdmann, J. A1 - Gorsler, H.-V. T1 - Plasmavorbehandlungen von Polymeroberflächen T2 - 2. Freiberger Polymertag : 30. Mai 1995 / Forschungsinstitut für Leder- und Kunstledertechnologie, Aninstitut der TU Bergakademie Freiberg T2 - 2. Freiberger Polymertag CY - Freiberg DA - 1995-05-30 PY - 1995 SP - 17 Seiten CY - Freiberg AN - OPUS4-7014 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 - Weidner, Steffen A1 - Geng, Sh. A1 - Wigant, L. A1 - Wöll, Ch. A1 - Erdmann, J. A1 - Gorsler, H.-V. T1 - Characterization of plasma-modified organic surfaces by electron spectroscopy, SEIRA, and MALDI-TOF-MS T2 - Proceedings of the 6th European Conference on Applications of Surface and Interface Analysis T2 - 6th European Conference on Applications of Surface and Interface Analysis CY - Montreux, Switzerland DA - 1995-10-09 PY - 1995 SP - TC 11 PB - Wiley CY - Chichester AN - OPUS4-7001 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -