Mechanical Engineering and Materials Science - Prof. dr. ir. E. van der Giessen
Programme design in brief Innovative design of high-performance mechanical components should make optimum use of the wealth of specially designed materials that are (becoming) available on the market. Modern materials derive their, sometimes fabulous, mechanical properties from their specific internal structure (microstructure). The essential link between materials science/engineering and mechanical engineering therefore relies on the quantitative relationship between the microstructure of a material and its mechanical properties. The development of such structure-property relationships is a multidisciplinary activity, with a strong bearing on solid mechanics concepts and methodologies as well as on characterisation techniques used in materials science. Micromechanics provides a powerful tool to determine such structure-property relationships and has gained much popularity during the last decade.
The entire research programme of this group does not focus on a specific material, but attempts to address the whole materials triangle, comprising metals, polymers and ceramics, as well as their composites. The coherence between the various subjects relies on the methodology. The contribution to this graduate school is in the area of deformation and fracture of polymer materials.
(last update: January 2001)
Polymer Materials and Engineering - Van Turnhout
Programme design in brief Electrical Properties
This part of the research programme focusses on the use of electric fields to investigate polymers and as a means to induce structural changes. Dielectric spectroscopy is explored for studying network formation, the properties of liquid crystalline main- and sidechain polymers, and the microstructure and properties of polymer blends. Dielectric spectros-copy is further applied for characterizing the durability of coatings. Structural changes induced in polymers by an electric field are studied by measuring the electromechanical response of liquid crystalline elastomeric net-works.
Heat wave techniques have been develo-ped which allow measure-ments on the thermal properties of polymer films and coatings during crosslinking or polyme-rization. The properties of polymeric nanostructures incorporated in zeolite crystals are analysed as well. Finally, hybrid structures consisting of a (porous) polymer film filled with an electro-active inorganic powder are synthesized and examined.
(last update: January 2001)
Radiation Chemistry - dr. J.M. Warman
Programme design in brief
Our research aims to provide insight into the factors that govern the dynamics of charge carriers and excitons in polymeric and discotic (liquid) crystalline materials. Charge carriers and excitons are produced by pulsed (UV-visible) photoexcitation or pulsed irradiation with 3 MeV electrons. These transient species are detected by time-resolved measurements of the real and imaginary conductivity, optical absorption and fluorescence. In this way insight is obtained into the mobility and decay (by recombination and/or trapping) of charge carriers as well as into the polarisabilty and lifetime of excitons. The studies involve bulk samples, thin films and isolated chains in dilute solution. The experiments are supported by theoretical studies based on incoherent hopping models and (ab initio) quantum mechanical calculations.
(last update: January 2001)
Section Theory of Complex Fluids - Prof. dr. T.J. Odijk
Programme design in brief Electrical Properties
Theory of complex fluids: we develop theories of complex fluids via statistical mechanical methods. Our focus is on a conceptual understanding of the systems in physical terms. (last update: January 2001)
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