Concept

Polyéthylène de masse molaire très élevée

Publications associées (106)

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Rheology of highly concentrated planar fiber suspensions

The rheology of highly concentrated fibers suspended in power-law fluids is investigated by upscaling the physics at the fiber scale. A deterministic upscaling technique is used, namely the homogenization method for periodic discrete structures. This micro ...

2005

Tensile fatigue performance of pultruded glass fiber reinforced polymer profiles

Thomas Keller

Axial tension-tension fatigue experiments were performed on pultruded glass fiber reinforced polymer (GFRP) plates in a laboratory environment. Different full-scale specimen shapes were examined: plate strips as-delivered, plate strips with tabs and plates ...

2005

Crazing and fracture in polymers. micromechanisms and effect of molecular variables

John Christopher Plummer

The influence of the primary molecular parameters chain configuration, architecture and molecular weight (MW) on the mode of mechanical breakdown is discussed for two series of (amorphous) thermoplastic polymers, methyl methacrylate glutarimide copolymers ...

2004

Microdeformation and Fracture in Bulk Polyolefins

John Christopher Plummer

The fracture properties and microdeformation behaviour and their correlation with structure in commercial bulk polyolefins are reviewed. Emphasis is on crack-tip deformation mechanisms and on regimes of direct practical interest, namely slow crack growth i ...

2004

Structure and deformation mechanisms in UHMWPE-fibres

John Christopher Plummer

Raman microscopy is applied to a gel-spun UHMWPE-fibre (Dyneema SK60) to determine the distribution of axial molecular stresses and their change with time (in creep and during stress relaxation). A more detailed method is proposed to quantify the observed ...

2003

Nuclear localization of mouse fibroblast growth factor 2 requires N-terminal and C-terminal sequences

Friedrich Beermann

In vertebrates, different isoforms of fibroblast growth factor 2 (FGF2) exist, which differ by their N-terminal extension. They show different localization and expression levels and exert distinct biological effects. Nevertheless, genetic inactivation of a ...

2003

Shear-lag versus finite element models for stress transfer in fiber-reinforced composites

William Curtin

The stress transfer from broken to unbroken fibers in fiber-reinforced polymer-matrix (PMC) and aluminum-matrix (AMC) composites is studied using a detailed 3D finite element model (FEM) and using the standard shear-lag model (SLM). The stress transfer pre ...

2002

Carbon nanotubes and nanostructures grown from diamond-like carbon and polyethylene

We report a simple way to synthesize carbon nanotubes and nanostructures from the solid phase. Vacuum annealing of diamond-like carbon (DLC) films or polyethylene mixed with catalyst in argon atmosphere leads to the formation of nanotubes and nanostructure ...

2001

Thermodynamic Evolution of Unsaturated Polyester-Styrene-Hyperbranched Polymers

The free energy of mixing during cure has been modeled for different blends of linear unsaturated polyester, styrene and allyl ether functional hyperbranched polymers. The molecular weight of the blend components has been implemented as measured by gel per ...

2001

Distributed optical fibre sensing in synthetic fibre ropes and cables

Luc Thévenaz

Distributed strain measurements on synthetic fibre ropes as used in marine applications are reported. The ropes incorporate single mode fibre-optic sensors for strain measurement. A Brillouin-amplification-based distributed strain measuring system has been ...

Society of Photo-Optical Instrumentation Engineers1999