Publications de Xavier Bulliard

Design and fabrication of compositionally graded inorganic oxide thin films: Mechanical, optical and permeation characteristics

Yves Leterrier, Xavier Bulliard, Ji Hyun Kim

Different types of inorganic oxide films composed of a chemical composition gradient single layer were designed, fabricated and characterized. Compositionally graded thin films were created by power-controlled co-sputtering of alumina (Al2O3) and silica (S ...

Elsevier2010

Effect of HBP modified γ-APS on the coating toughness and practical adhesion between galvanised steel and polyethylene

Véronique Michaud, Xavier Bulliard, Gabrielle Pax

Epoxy-functionalised hyperbranched polymers (HBP) were combined with aminosilanes to form coatings and their effect on the practical adhesion between galvanised steel and polyethylene was investigated. It was shown that HBPs were initially soluble in silan ...

2007

Reaction-Induced Phase Separation in Poly(vinyl acetate)/ Polyester Blend

Véronique Michaud, Xavier Bulliard

In blends of unsaturated polyester (UP), poly (vinyl acetate) (PVAc), and styrene, a reaction-induced phase separation occurs upon curing that is due to the crosslinking between styrene and the UP molecules. The evolution of the morphology was observed by ...

2006

Low-Profile mechanisms in a PVAc/polyester blend

Véronique Michaud, Xavier Bulliard

The different steps associated with the curing of a PVAc/polyester blend are identified and correlated to the mechanism of shrinkage control in the presence of a low-profile additive (LPA). Poly(vinyl acetate) (PVAc) is used as a LPA and is shown to induce ...

2006

An Explanation of the Low Profile Mechanism in Unsaturated Polyester resins

Véronique Michaud, Xavier Bulliard

2005

Phase separation at the fiber-matrix interface in composites based on a thermoplastic/polyester blend

Véronique Michaud, Xavier Bulliard

A study of the microstructure developing at the surface of glass fibers in a poly(vinyl acetate) (PVAc)/polyester blend is presented. Three different experimental methods are used: a technique based on the Wilhelmy method to measure the wettability of the ...

2005

Wettability of Glass Fibers in Reactive Thermoplastic/Polyester Blends: Comparison between Compatible and Incompatible Thermoplastics

Véronique Michaud, Xavier Bulliard

The evolution of morphology of reactive thermoplastic/unsaturated polyester blends at the surface of glass fibers is investigated during curing. The study focuses on two different types of thermoplastics, incompatible and compatible respectively with the p ...

2005

Low-profile mechanisms in composites with thermoplastic/polyester blend matrices

Xavier Bulliard

Unsaturated Polyester (UP) resins are extensively used as a matrix for the production of composites due to their low cost and versatility. Their significant polymerization shrinkage has however a negative impact on the dimensional stability of the molded p ...

EPFL2004