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Yves Leterrier

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Related publications (159)

Durability of aminosilane-silica hybrid gas-barrier coatings on polymers

Gil Rochat, Yves Leterrier, Bandeep Singh

Aminosilane solutions with pH equal to 8 and to 11 were applied and cured on SiO2 coated poly(ethylene terephthalate) (PET) films. The permeability of the silane-silica hybrid coating on PET was reduced twofold compared to that of the SiO2/PET film, at sol ...

2007

Damage analysis of ultralight composite sandwich structure

Yves Leterrier, Julien Rion, Fabio Demarco

2007

Ultra-thin hybrid organic/inorganic gas barrier coatings on polymers

Gil Rochat, Yves Leterrier, Bandeep Singh

The oxygen transmission rate of 48 nm thick SiO2 coatings on a poly(ethylene terephthalate) (PET) substrate was reduced by a factor of three after applying an 8 nm thick layer of oligomerized gammaaminopropyltriethoxysilane (γ-APS). Increasing the thicknes ...

2007

Interface interactions in hybrid organosilane-nitride films on polymer substrates

Yves Leterrier

Organic-inorganic hybrid coatings are becoming increasingly important due to their unique property combination [1, 2], including high optical transparency, improved scratch and abrasion resistance and excellent weathering, thanks to the synergism between t ...

2007

Electro-Fragmentation Analysis of Dielectric Thin Films on Flexible Polymer Substrates

Yves Leterrier, Bastian Meylan, Aurélie Mottet

2007

Towards High-k Silicone Composite Material for Low-Voltage Dielectric Elastomer Actuators

Yves Leterrier, Frank Nüesch, John Christopher Plummer, Martin Molberg

2007

Conversion analysis of acrylated hyperbranched polymers UV-cured below their ultimate glass transition temperature

Yves Leterrier, Daniel Schmäh, Lars Schmidt

The photo-curing behavior of reactive blends of dipentaerythritol penta/hexaacrylate (DPHA) with an acrylated hyperbranched polyester and an acrylated hyperbranched polyether was investigated by means of photo differential scanning calorimetry. The chemica ...

2007

Time-intensity transformation and internal stress in UV-curable hyperbranched acrylates

Yves Leterrier, Daniel Schmäh, Lars Schmidt

The photocuring of three different highly functional acrylates—Di-pentaerythritol penta/hexaacrylate (DPHA) and two hyperbranched molecules (HBP), one with a stiff polyester and one with a more flexible polyether structure—was investigated by means of phot ...

Springer-Verlag2007

Thermo-hygro-mechanical behaviour of ultrathin multilayer composite materials for flexible display applications

Yves Leterrier

Flexible displays form complex structures joining together multiple layers of very various materials: metal or plastic flexible substrate, barrier and encapsulation layers, thin-films of transistor and optoelectronic devices. Residual stresses are inherent ...

2007

A fast low-temperature micromolding process for hydrophilic microfluidic devices using UV-curable acrylated hyperbranched polymers

Yves Leterrier, Lars Schmidt

A novel UV-curable low-stress hyperbranched polymer (HBP) micromolding process is presented for the fast and low-temperature fabrication of hydrophilic microfluidic devices. Process, material and surface properties of the acrylated polyether HBP are also c ...

2007

Mechanical integrity analysis of multilayer insulator coatings on flexible steel substrates

Yves Leterrier

The cohesive and adhesive properties, and related critical radius of curvature of thin multilayer insulator coatings on a 152 μm thick flexible steel substrate were investigated using tensile experiments carried out in-situ in an optical microscope. This m ...

2007

Evaluation of interfacial stress transfer efficiency by coating fragmentation test

Yves Leterrier, Grégory Tornare

Probabilistic model of coating fragmentation under uniaxial tensile loading is developed. Analytical expressions of the crack spacing evolution are obtained for small-strain and large-strain fragmentation regimes. The model is applied for coating and inter ...

2007

Hybrid organic/inorganic interphases in polymer composites

Yves Leterrier, Bandeep Singh

2006

Evaluation of thin film adhesion on compliant substrates by buckling pattern analysis in fragmentation test

Yves Leterrier, Grégory Tornare

2006

Formation of aminosilane-oxide interphases

Yves Leterrier, Gabrielle Pax, Véronique Michaud

The aim of this work is to understand the interactions and interphase formation mechanisms between a liquid aminosilane oligomer (γ -APS) and glass, steel or gold surfaces as a function of the pH of the liquid aminosilane. When basic liquid γ -APS (pH 11.4 ...

2006

Cohesive and adhesive properties of polycaprolactone/silica hybrid coatings on poly(methyl methacrylate) substrates

Yves Leterrier, Bandeep Singh

Organic–inorganic hybrid materials were prepared using the sol–gel process in order to improve the scratch resistance of poly(methyl methacrylate) (PMMA) substrates. Sol–gel solutions based on tetraethoxysilane and α,ω-triethoxysilane terminated polycaprol ...

2006

Polymer Nanocomposite Encapsulation of Organic Light Emitting and Photovoltaic Devices

Yves Leterrier, Grégory Tornare, Lars Schmidt, Bandeep Singh

2006

Intrinsic, thermal and hygroscopic stresses in diffusion barrier films on polymer substrates for flexible displays

Yves Leterrier, Grégory Tornare

2006

The role of the amino-organosilane/SiOx interphase in the barrier and mechanical performance of nanocomposites

Gil Rochat, Yves Leterrier

The aim of this study is to develop coatings on polymer substrates with a combined increase in oxygen barrier performance and toughness, based on SiOx coatings modified with multifunctional organo-silane polymers of controlled polarity and reactivity. As a ...

2006

Modeling of multiple cracking and decohesion of a thin film on a polymer substrate

Yves Leterrier

Thin brittle films on polymer substrates are finding increasing use as gas barriers for example in the medical and food packaging industries and also for the next generation of ultra-light displays based on flexible polymer substrates. In order to determin ...

2006

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