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Valérie Geiser

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Publications associées (8)

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Nanocomposite materials based on a HBP and silica are produced using either a dual-cure sol/gel and photopolymerization process or by mixing silica nanoparticles with the HBP. In both cases the conversion of the HBP is independent of composition and obeys ...

2012

The present invention concerns a dual cure composition comprising a radiation curable polymer precursor, solid particles, an organometallic precursor and a coupling agent, a hybrid organic/inorganic nanocomposite material produced using said dual cure comp ...

2012

Low-Stress UV-Curable Hyperbranched Polymer Nanocomposites for High-Precision Devices

Valérie Geiser

The aim of this thesis was to investigate the process-structure-property relationships of UV-curable hyperbranched polymer (HBP)/silica nanocomposites. Special attention was paid to the interplay between photo-conversion, rheological behavior, shrinkage, a ...

EPFL2010

Immobilized polymer fraction in hyperbranched polymer/silica nanocomposite suspensions

Yves Leterrier, Sara Dalle Vacche, Valérie Geiser, Riccardo Ruggerone

The glass transition behavior of hyperbranched polymer (HBP) molecules with suspensions of silica and glass particles up to the concentrated regime (25 vol %) was analyzed by modulated differential scanning calorimetry (MDSC). The reversing and nonreversin ...

American Chemical Society2010

Time-Intensity Superposition for Photoinitiated Polymerization of Fluorinated and Hyperbranched Acrylate Nanocomposites

Sara Dalle Vacche, Valérie Geiser

The validity of the time-intensity superposition principle for the photoinitiated polymerization of nanocomposites based on a monofunctional fluorinated acrylate and on a multifunctional hyperbranched polyether acrylate was investigated in this work. Maste ...

2010

Rheological behavior of concentrated hyperbranched polymer/silica nanocomposite suspensions

Yves Leterrier, Valérie Geiser

The rheological behavior of two hyperbranched polymer/silica suspensions with different dispersion states, surface chemistries, and concentrations of the silica nanoparticles was investigated in terms of viscoelastic properties, activation energy for visco ...

American Chemical Society2010

Nanoimprint lithography with UV-curable hyperbranched polymer nanocomposites

Yves Leterrier, Valérie Geiser

Nano-scale patterns were produced with UV-curable acrylated hyperbranched polymer nanocomposites using nanoimprint lithography with a glass master in a rapid, low-pressure process. The pattern of the glass master was replicated with composites containing u ...

Wiley-Blackwell2010

The photo-curing behavior of composites containing nanosized SiO2 in an acrylated hyperbranched polymer matrix was investigated by means of photo differential scanning calorimetry. The chemical conversion data were analyzed using an autocatalytic model, pa ...

Wiley-Blackwell2009