Suter, Ulrich W. - Eidgenössische Technische Hochschule Zürich - Department of Chemistry and Applied Biosciences

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Eidgenössische Technische Hochschule Zürich Department of Chemistry and Applied Biosciences
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1. Structure and phase transitions of alkyl chains on mica Heinz, Hendrik, Castelijns, Hein J. and Suter, Ulrich W. (2003) We use molecular dynamics as a too] to understand the structure and phase transitions [Osman, M. A.; et al. J. Phys. Chem. B 2000, 104, 4433-4439. Osman, M. A.; et al. J. Phys. Chem. B 2002, 106, 653-662) in alkylammonium micas. The consistent force field 91 is extended for... Journal Items 2. Surface treatment of clay minerals Osman, Maged A., Plötze, Lothar Michael and Suter, Ulrich W. (2003) Oxidative thermal degradation of organically modified montmorillonite (OM) and muscovite was studied using conventional and high-resolution TGA. Analysis of the ultra thin alkylammonium film covering the mineral surface revealed a correlation between thermal stability and extent of... Journal Items 3. Polyurethane adhesive nanocomposites as gas permeation barrier Osman, Maged A., Mittal, Vikas, Morbidelli, Massimo and Suter, Ulrich W. (2003) Adhesive nanocomposites of organically modified montmorillonite (OM) and polyurethane have been synthesized and their permeability to oxygen and water vapor has been measured. The gas permeation through the composites was correlated to the volume fraction of the impermeable... Journal Items 4. Influence of excessive filler coating on the tensile properties of LDPE–calcium carbonate composites Osman, Maged A., Atallah, Ayman and Suter, Ulrich W. (2004) Calcium carbonate fillers are usually coated with stearic acid to reduce their surface energy and improve their dispersion in polymers. Commercial products are often over-coated and contain an excess of surfactant. It was found that stearic acid linearly increases the modulus and... Journal Items 5. Analysis of the phase transitions in alkyl-mica by density and pressure profiles Heinz, Hendrik, Paul, Wolfgang, Suter, Ulrich W. and Binder, Kurt (2004) In a previous work [Heinz, Castelijns, and Suter, J. Am. Chem. Soc. 115, 9500 (2003)], we developed an accurate force field and simulated the phase transitions in C-18-mica (octadecyltrimethylammonium-mica) as well as the absence of such transitions in 2C(18)-mica... Journal Items 6. Surface Structure of Organoclays Heinz, Hendrik and Suter, Ulrich W. (2004) Journal Items 7. Covalent binding of biorecognition groups to solids using poly(hydromethylsiloxane) as linkage Zhang, Xuequn, Deckert, Volker, Steiger, Beat, Hirayama, Martina K.N., Suter, Ulrich W. and Pretsch, Ernö (2004) By activating Si-H bonds, poly(hydromethylsiloxane) can be covalently bound in a first step to various metal or polymer surfaces. In a second step, unreacted Si-H bonds can be brought to react with organic compounds having adequate functional groups such as double or triple bonds,... Journal Items 8. Epoxy-layered silicate nanocomposites and their gas permeation properties Osman, Maged A., Mittal, Vikas, Morbidelli, Massimo and Suter, Ulrich W. (2004) Epoxy-OM (organo-montmorillonite) nanocomposites have been synthesized, and their permeability to oxygen and water vapor has been measured. The chemical structure of the organic monolayer ionically bonded to the montmorillonite surface has been varied, and its influence on the... Conference Contributions 9. Atomic Charges for Classical Simulations of Polar Systems Heinz, Hendrik and Suter, Ulrich W. (2004) Structure and reactivity often are dependent on the polarity of chemical bonds. This relationship is reflected by atomic charges in classical (semiempirical) atomistic simulations; however, disagreement between atomic charges from accurate experimental investigations, ab initio... Journal Items 10. Gas permeation properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) The inorganic cations of clays with different cation exchange capacities (CECs) have been exchanged with alkyl ammonium ions, in which 1-4 octadecyl chains are attached to the nitrogen atom. In this way, organo-montmorillonites (OMs) with different surface coverage and alkyl chain... Journal Items 11. Influence of platelet aspect ratio and orientation on the storage and loss moduli of HDPE-mica composites Kuelpmann, Albrecht, Osman, Maged A., Kocher, Lars and Suter, Ulrich W. (2005) Composites of HDPE and glass or mica particles with different aspect ratios and surface modifications were prepared. The aspect ratio of the mica platelets was evaluated by image analysis of SEM micrographs. Test specimens, in which the platelet faces are oriented either parallel... Journal Items 12. Tensile properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) The sodium ions of clays with different cation exchange capacities (CEC) have been exchanged with alkyl ammonium ions, in which 1-4 octadecyl chains are attached to the nitrogen atom. Due to the different cation cross-sectional area to available area per cation ratio, the resulting... Journal Items 13. Effect of non-ionic surfactants on the exfoliation and properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) Nanocomposites of high-density-polyethylene (HDPE) and organically (dimethyldioctadecylammonium) modified montmorillonite (OM) were prepared and the effect of non-ionic surfactants on the OM exfoliation and composite properties (tensile + gas-permeation) was studied. Amphiphilic... Journal Items 14. Determination of orientational order in deformed glassy PMMA from solid-state NMR data Wendlandt, Michael, Beek, Jacco D. van, Suter, Ulrich W. and Meier, Beat H. (2005) The orientational distribution function for polymer chain segments in plain-strain compressed glassy poly(methyl methacrylate) is evaluated, as a function of two polar angles, from a series of one-dimensional deuterium NMR spectra. The experimental data are analyzed using a... Journal Items 15. Non-linear, rate-dependent strain-hardening behavior of polymer glasses Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2005) This study is concerned with the finite, large strain deformation behavior of polymeric glasses. True stress-strain curves in uniaxial compression obtained for five different polymeric glasses: polycarbonate, polystyrene, poly(2,6-dimethyl-1.4-phenylene oxide), and linear and... Journal Items 16. Segmental orientation in plastically deformed glassy PMMA Wendlandt, Michael, Tervoort, Theo A., van Beek, Jacco D. and Suter, Ulrich W. (2006) In this study, spatial orientational distribution functions of labeled chain segments of cross-linked and linear PMMA were obtained by solid-state NMR as a function of finite deformation (far) below and (far) above the glass transition temperature Tg. The applied data analysis... Journal Items 17. Poly(propylene)-layered silicate nanocomposites Osman, Maged A., Mittal, Vikas and Suter, Ulrich W. (2007) To monitor the mineral surface coverage and energy, the inorganic cations of two clays (montmorillonite) with different surface area/cation have been exchanged by alkylammonium ions, carrying alkyl chains of different number and length. The prepared OMs were free of unreacted... Journal Items 18. Surface-textured PEG-based hydrogels with adjustable elasticity Pfister, Pascal M., Wendlandt, Michael, Neuenschwander, Peter and Suter, Ulrich W. (2007) Poly(ethylene glycol)-dimethacrylate (PEGDMA)-based hydrogels with adjustable shear modulus within the range of 10 kPa to 1 MPa and precisely predefinable surface textures on a micro-scale were made. It was observed that the volume of all hydrogels after preparation almost exactly... Journal Items 19. Does the strain hardening modulus of glassy polymers scale with the flow stress? Govaert, Leon E., Engels, Tom A.P., Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2008) Using a generic coarse-grained bead-spring model, Hoy and Robbins reproduced important experimental observations on strain hardening, specifically the generally observed Gaussian strain hardening response and its dependence on network density and temperature. Moreover,... Journal Items 20. Strain-Hardening Modulus of Cross-Linked Glassy Poly(methyl methacrylate) Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2010) The strain hardening modulus, defined as the slope of the increasing stress with strain during large strain uniaxial plastic deformation, was extracted from a recently proposed constitutive model for the finite nonlinear viscoelastic deformation of polymer glasses, and compared to... Conference Contributions 1. Structure and phase transitions of alkyl chains on mica Heinz, Hendrik, Castelijns, Hein J. and Suter, Ulrich W. (2003) We use molecular dynamics as a too] to understand the structure and phase transitions [Osman, M. A.; et al. J. Phys. Chem. B 2000, 104, 4433-4439. Osman, M. A.; et al. J. Phys. Chem. B 2002, 106, 653-662) in alkylammonium micas. The consistent force field 91 is extended for... Journal Items 2. Surface treatment of clay minerals Osman, Maged A., Plötze, Lothar Michael and Suter, Ulrich W. (2003) Oxidative thermal degradation of organically modified montmorillonite (OM) and muscovite was studied using conventional and high-resolution TGA. Analysis of the ultra thin alkylammonium film covering the mineral surface revealed a correlation between thermal stability and extent of... Journal Items 3. Polyurethane adhesive nanocomposites as gas permeation barrier Osman, Maged A., Mittal, Vikas, Morbidelli, Massimo and Suter, Ulrich W. (2003) Adhesive nanocomposites of organically modified montmorillonite (OM) and polyurethane have been synthesized and their permeability to oxygen and water vapor has been measured. The gas permeation through the composites was correlated to the volume fraction of the impermeable... Journal Items 4. Influence of excessive filler coating on the tensile properties of LDPE–calcium carbonate composites Osman, Maged A., Atallah, Ayman and Suter, Ulrich W. (2004) Calcium carbonate fillers are usually coated with stearic acid to reduce their surface energy and improve their dispersion in polymers. Commercial products are often over-coated and contain an excess of surfactant. It was found that stearic acid linearly increases the modulus and... Journal Items 5. Analysis of the phase transitions in alkyl-mica by density and pressure profiles Heinz, Hendrik, Paul, Wolfgang, Suter, Ulrich W. and Binder, Kurt (2004) In a previous work [Heinz, Castelijns, and Suter, J. Am. Chem. Soc. 115, 9500 (2003)], we developed an accurate force field and simulated the phase transitions in C-18-mica (octadecyltrimethylammonium-mica) as well as the absence of such transitions in 2C(18)-mica... Journal Items 6. Surface Structure of Organoclays Heinz, Hendrik and Suter, Ulrich W. (2004) Journal Items 7. Covalent binding of biorecognition groups to solids using poly(hydromethylsiloxane) as linkage Zhang, Xuequn, Deckert, Volker, Steiger, Beat, Hirayama, Martina K.N., Suter, Ulrich W. and Pretsch, Ernö (2004) By activating Si-H bonds, poly(hydromethylsiloxane) can be covalently bound in a first step to various metal or polymer surfaces. In a second step, unreacted Si-H bonds can be brought to react with organic compounds having adequate functional groups such as double or triple bonds,... Journal Items 8. Epoxy-layered silicate nanocomposites and their gas permeation properties Osman, Maged A., Mittal, Vikas, Morbidelli, Massimo and Suter, Ulrich W. (2004) Epoxy-OM (organo-montmorillonite) nanocomposites have been synthesized, and their permeability to oxygen and water vapor has been measured. The chemical structure of the organic monolayer ionically bonded to the montmorillonite surface has been varied, and its influence on the... Conference Contributions 9. Atomic Charges for Classical Simulations of Polar Systems Heinz, Hendrik and Suter, Ulrich W. (2004) Structure and reactivity often are dependent on the polarity of chemical bonds. This relationship is reflected by atomic charges in classical (semiempirical) atomistic simulations; however, disagreement between atomic charges from accurate experimental investigations, ab initio... Journal Items 10. Gas permeation properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) The inorganic cations of clays with different cation exchange capacities (CECs) have been exchanged with alkyl ammonium ions, in which 1-4 octadecyl chains are attached to the nitrogen atom. In this way, organo-montmorillonites (OMs) with different surface coverage and alkyl chain... Journal Items 11. Influence of platelet aspect ratio and orientation on the storage and loss moduli of HDPE-mica composites Kuelpmann, Albrecht, Osman, Maged A., Kocher, Lars and Suter, Ulrich W. (2005) Composites of HDPE and glass or mica particles with different aspect ratios and surface modifications were prepared. The aspect ratio of the mica platelets was evaluated by image analysis of SEM micrographs. Test specimens, in which the platelet faces are oriented either parallel... Journal Items 12. Tensile properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) The sodium ions of clays with different cation exchange capacities (CEC) have been exchanged with alkyl ammonium ions, in which 1-4 octadecyl chains are attached to the nitrogen atom. Due to the different cation cross-sectional area to available area per cation ratio, the resulting... Journal Items 13. Effect of non-ionic surfactants on the exfoliation and properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) Nanocomposites of high-density-polyethylene (HDPE) and organically (dimethyldioctadecylammonium) modified montmorillonite (OM) were prepared and the effect of non-ionic surfactants on the OM exfoliation and composite properties (tensile + gas-permeation) was studied. Amphiphilic... Journal Items 14. Determination of orientational order in deformed glassy PMMA from solid-state NMR data Wendlandt, Michael, Beek, Jacco D. van, Suter, Ulrich W. and Meier, Beat H. (2005) The orientational distribution function for polymer chain segments in plain-strain compressed glassy poly(methyl methacrylate) is evaluated, as a function of two polar angles, from a series of one-dimensional deuterium NMR spectra. The experimental data are analyzed using a... Journal Items 15. Non-linear, rate-dependent strain-hardening behavior of polymer glasses Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2005) This study is concerned with the finite, large strain deformation behavior of polymeric glasses. True stress-strain curves in uniaxial compression obtained for five different polymeric glasses: polycarbonate, polystyrene, poly(2,6-dimethyl-1.4-phenylene oxide), and linear and... Journal Items 16. Segmental orientation in plastically deformed glassy PMMA Wendlandt, Michael, Tervoort, Theo A., van Beek, Jacco D. and Suter, Ulrich W. (2006) In this study, spatial orientational distribution functions of labeled chain segments of cross-linked and linear PMMA were obtained by solid-state NMR as a function of finite deformation (far) below and (far) above the glass transition temperature Tg. The applied data analysis... Journal Items 17. Poly(propylene)-layered silicate nanocomposites Osman, Maged A., Mittal, Vikas and Suter, Ulrich W. (2007) To monitor the mineral surface coverage and energy, the inorganic cations of two clays (montmorillonite) with different surface area/cation have been exchanged by alkylammonium ions, carrying alkyl chains of different number and length. The prepared OMs were free of unreacted... Journal Items 18. Surface-textured PEG-based hydrogels with adjustable elasticity Pfister, Pascal M., Wendlandt, Michael, Neuenschwander, Peter and Suter, Ulrich W. (2007) Poly(ethylene glycol)-dimethacrylate (PEGDMA)-based hydrogels with adjustable shear modulus within the range of 10 kPa to 1 MPa and precisely predefinable surface textures on a micro-scale were made. It was observed that the volume of all hydrogels after preparation almost exactly... Journal Items 19. Does the strain hardening modulus of glassy polymers scale with the flow stress? Govaert, Leon E., Engels, Tom A.P., Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2008) Using a generic coarse-grained bead-spring model, Hoy and Robbins reproduced important experimental observations on strain hardening, specifically the generally observed Gaussian strain hardening response and its dependence on network density and temperature. Moreover,... Journal Items 20. Strain-Hardening Modulus of Cross-Linked Glassy Poly(methyl methacrylate) Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2010) The strain hardening modulus, defined as the slope of the increasing stress with strain during large strain uniaxial plastic deformation, was extracted from a recently proposed constitutive model for the finite nonlinear viscoelastic deformation of polymer glasses, and compared to... Conference Contributions

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Structure and phase transitions of alkyl chains on mica Heinz, Hendrik, Castelijns, Hein J. and Suter, Ulrich W. (2003) We use molecular dynamics as a too] to understand the structure and phase transitions [Osman, M. A.; et al. J. Phys. Chem. B 2000, 104, 4433-4439. Osman, M. A.; et al. J. Phys. Chem. B 2002, 106, 653-662) in alkylammonium micas. The consistent force field 91 is extended for... Surface treatment of clay minerals Osman, Maged A., Plötze, Lothar Michael and Suter, Ulrich W. (2003) Oxidative thermal degradation of organically modified montmorillonite (OM) and muscovite was studied using conventional and high-resolution TGA. Analysis of the ultra thin alkylammonium film covering the mineral surface revealed a correlation between thermal stability and extent of... Polyurethane adhesive nanocomposites as gas permeation barrier Osman, Maged A., Mittal, Vikas, Morbidelli, Massimo and Suter, Ulrich W. (2003) Adhesive nanocomposites of organically modified montmorillonite (OM) and polyurethane have been synthesized and their permeability to oxygen and water vapor has been measured. The gas permeation through the composites was correlated to the volume fraction of the impermeable... Influence of excessive filler coating on the tensile properties of LDPE–calcium carbonate composites Osman, Maged A., Atallah, Ayman and Suter, Ulrich W. (2004) Calcium carbonate fillers are usually coated with stearic acid to reduce their surface energy and improve their dispersion in polymers. Commercial products are often over-coated and contain an excess of surfactant. It was found that stearic acid linearly increases the modulus and... Analysis of the phase transitions in alkyl-mica by density and pressure profiles Heinz, Hendrik, Paul, Wolfgang, Suter, Ulrich W. and Binder, Kurt (2004) In a previous work [Heinz, Castelijns, and Suter, J. Am. Chem. Soc. 115, 9500 (2003)], we developed an accurate force field and simulated the phase transitions in C-18-mica (octadecyltrimethylammonium-mica) as well as the absence of such transitions in 2C(18)-mica... Surface Structure of Organoclays Heinz, Hendrik and Suter, Ulrich W. (2004) Covalent binding of biorecognition groups to solids using poly(hydromethylsiloxane) as linkage Zhang, Xuequn, Deckert, Volker, Steiger, Beat, Hirayama, Martina K.N., Suter, Ulrich W. and Pretsch, Ernö (2004) By activating Si-H bonds, poly(hydromethylsiloxane) can be covalently bound in a first step to various metal or polymer surfaces. In a second step, unreacted Si-H bonds can be brought to react with organic compounds having adequate functional groups such as double or triple bonds,... Epoxy-layered silicate nanocomposites and their gas permeation properties Osman, Maged A., Mittal, Vikas, Morbidelli, Massimo and Suter, Ulrich W. (2004) Epoxy-OM (organo-montmorillonite) nanocomposites have been synthesized, and their permeability to oxygen and water vapor has been measured. The chemical structure of the organic monolayer ionically bonded to the montmorillonite surface has been varied, and its influence on the... Atomic Charges for Classical Simulations of Polar Systems Heinz, Hendrik and Suter, Ulrich W. (2004) Structure and reactivity often are dependent on the polarity of chemical bonds. This relationship is reflected by atomic charges in classical (semiempirical) atomistic simulations; however, disagreement between atomic charges from accurate experimental investigations, ab initio... Gas permeation properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) The inorganic cations of clays with different cation exchange capacities (CECs) have been exchanged with alkyl ammonium ions, in which 1-4 octadecyl chains are attached to the nitrogen atom. In this way, organo-montmorillonites (OMs) with different surface coverage and alkyl chain... Influence of platelet aspect ratio and orientation on the storage and loss moduli of HDPE-mica composites Kuelpmann, Albrecht, Osman, Maged A., Kocher, Lars and Suter, Ulrich W. (2005) Composites of HDPE and glass or mica particles with different aspect ratios and surface modifications were prepared. The aspect ratio of the mica platelets was evaluated by image analysis of SEM micrographs. Test specimens, in which the platelet faces are oriented either parallel... Tensile properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) The sodium ions of clays with different cation exchange capacities (CEC) have been exchanged with alkyl ammonium ions, in which 1-4 octadecyl chains are attached to the nitrogen atom. Due to the different cation cross-sectional area to available area per cation ratio, the resulting... Effect of non-ionic surfactants on the exfoliation and properties of polyethylene-layered silicate nanocomposites Osman, Maged A., Rupp, Jörg E.P. and Suter, Ulrich W. (2005) Nanocomposites of high-density-polyethylene (HDPE) and organically (dimethyldioctadecylammonium) modified montmorillonite (OM) were prepared and the effect of non-ionic surfactants on the OM exfoliation and composite properties (tensile + gas-permeation) was studied. Amphiphilic... Determination of orientational order in deformed glassy PMMA from solid-state NMR data Wendlandt, Michael, Beek, Jacco D. van, Suter, Ulrich W. and Meier, Beat H. (2005) The orientational distribution function for polymer chain segments in plain-strain compressed glassy poly(methyl methacrylate) is evaluated, as a function of two polar angles, from a series of one-dimensional deuterium NMR spectra. The experimental data are analyzed using a... Non-linear, rate-dependent strain-hardening behavior of polymer glasses Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2005) Segmental orientation in plastically deformed glassy PMMA Wendlandt, Michael, Tervoort, Theo A., van Beek, Jacco D. and Suter, Ulrich W. (2006) In this study, spatial orientational distribution functions of labeled chain segments of cross-linked and linear PMMA were obtained by solid-state NMR as a function of finite deformation (far) below and (far) above the glass transition temperature Tg. The applied data analysis... Poly(propylene)-layered silicate nanocomposites Osman, Maged A., Mittal, Vikas and Suter, Ulrich W. (2007) To monitor the mineral surface coverage and energy, the inorganic cations of two clays (montmorillonite) with different surface area/cation have been exchanged by alkylammonium ions, carrying alkyl chains of different number and length. The prepared OMs were free of unreacted... Surface-textured PEG-based hydrogels with adjustable elasticity Pfister, Pascal M., Wendlandt, Michael, Neuenschwander, Peter and Suter, Ulrich W. (2007) Poly(ethylene glycol)-dimethacrylate (PEGDMA)-based hydrogels with adjustable shear modulus within the range of 10 kPa to 1 MPa and precisely predefinable surface textures on a micro-scale were made. It was observed that the volume of all hydrogels after preparation almost exactly... Does the strain hardening modulus of glassy polymers scale with the flow stress? Govaert, Leon E., Engels, Tom A.P., Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2008) Using a generic coarse-grained bead-spring model, Hoy and Robbins reproduced important experimental observations on strain hardening, specifically the generally observed Gaussian strain hardening response and its dependence on network density and temperature. Moreover,... Strain-Hardening Modulus of Cross-Linked Glassy Poly(methyl methacrylate) Wendlandt, Michael, Tervoort, Theo A. and Suter, Ulrich W. (2010) The strain hardening modulus, defined as the slope of the increasing stress with strain during large strain uniaxial plastic deformation, was extracted from a recently proposed constitutive model for the finite nonlinear viscoelastic deformation of polymer glasses, and compared to...

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