Concept

Polymer degradation

Related publications (298)

Thermodynamic Analysis of Biodegradation Pathways

Vassily Hatzimanikatis, Stacey Deleria Finley

Microorganisms provide a wealth of bio-degradative potential in the reduction and elimination of xenobiotic compounds in the environment. One useful metric to evaluate potential biodegradation pathways is thermodynamic feasibility. However, experimental da ...

2009

Experimental investigation on temperature-dependent thermo- physical and mechanical properties of pultruded GFRP composites

Thomas Keller, Yu Bai

The temperature-dependent thermo-physical and mechanical properties of a pultruded E-glass fiber-reinforced polyester (GFRP) composite are investigated in this paper. Fitting of theoretical models of the material properties to results of TGA, DSC, hot disk ...

2008

Quantitative study of Ni-zirconia anode micro- and nanostructure related to SOFC stack degradation

Jan Van Herle, Aïcha Hessler-Wyser, Antonin Faes

As the performances of Solid Oxide Fuel Cells (SOFC) get attractive, long term degradation becomes the main issue for this technology. Therefore it is essential to localise the origin of degradation and to understand its mechanisms in order to find solutio ...

2008

Stable freestanding thin films of pure water

Giorgio Margaritondo

Obtaining water microstructures is very difficult because of low viscosity and high surface tension. We produced stable freestanding thin films of pure water by x-ray bombardment of small liquid volumes in capillary tubes. A detailed characterization with ...

American Institute of Physics2008

Thermodynamic and kinetic degradation reactions of organic substances in groundwater modelled with PHREEQC

Johann Jakob Holch

Aim of this diploma thesis is to approach to kinetic modelling of subsurface hydrochemistry with the program code phreeqc. The reaction considered is the degradation of organic mass and its concomitant reactions. Phreeqc is a program for thermodynamical ba ...

2008

Human fetal bone cells associated with ceramic reinforced PLA scaffolds for tissue engineering

Dominique Pioletti, Pierre-Etienne Bourban, Corinne Scaletta, Claire Diane Delabarde

Fetal bone cells were shown to have an interesting potential for therapeutic use in bone tissue engineering due to their rapid growth rate and their ability to differentiate into mature osteoblasts in vitro. We describe hereafter their capability to promot ...

2008

Analysis of pathologies and long term behaviour of the Swiss national road tunnels

Federica Sandrone

This project, supported by the Swiss Federal Roads Authority (OFROU), focuses on the long term behaviour of road tunnels and on their main pathologies. As a tunnel is composed by lining structure and rock mass, it has been necessary to consider the effects ...

EPFL2008

Investigation of Local Electrochemical Performance and Local Degradation in an Operating Solid Oxide Fuel Cell

Daniel Favrat, Jan Van Herle, Stefan Diethelm, Zacharie Wuillemin, Arata Nakajo, Andres Müller, Nordahl Autissier

In order to characterize a new SOFC stack design, to investigate degradation processes and to validate models, a diagnostic test station was designed and realized. It allows to characterize repeat-elements locally by measuring the local potential, current ...

European Fuel Cell Forum2008

Aqueous-phase biphasic dehydroaromatization of bio-derived limonene into p-cymene by soluble Pd nanocluster catalysts

Paul Joseph Dyson, Chenxu Zhao, Weijia Gan

A biphasic approach to the dehydroaromatization of bioderived limonene into water-insol. p-cymene using sol. Pd nanoparticle catalysts in an aq. phase (³150 °C, 2 bar H2) was successfully achieved with a conversion of 93% and a selectivity of 82%. The Pd n ...

2008

Synchrotron X-Rays for Microstructural Investigations of Advanced Reactor Materials

Manuel Alexandre Pouchon, Wolfgang Hoffelner, Maria Samaras

X-rays from synchrotron beamlines provide a powerful tool for materials analysis in circumstances where long-term materials degradation under complex loading conditions (e.g., temperature, irradiation, and stress) becomes important. This may occur for adva ...

2008

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