Berlin 2008 – scientific programme

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SYSA: Symposium Tayloring Organic Interfaces: Molecular Structures and Applications

SYSA 5: Poster Session SYSA

SYSA 5.57: Poster

Tuesday, February 26, 2008, 14:30–20:00, Poster A

Simultaneous acquisition of rheological data and microscopic information — •Annette Fischer — Thermo Fisher Scientific, Dieselstr.4, 76227 Karlsruhe

Foams can be defined as composite materials characterized by a solid or liquid continuous matrix which surrounds a gaseous phase.The possibility of combining the properties of the continuous matrix and gas voids in a great variety of morphologies,is a powerful tool in the material industry to design materials with properties for nearly any kind of applications were performance and low weight are requested. The characterization of foam is very difficult.Numerous parameters have to be considered and controlled:foam quality,foam texture,size of the measurement apparatus compared to bubbles size,influence of foam production method, wall slip phenomena and foam compressibility. These numerous parameters do explain there is no general view concerning the behaviour of this kind of system. Rheological methods reveal information on macroscopic material properties.However,the mechanical material properties are strongly dependent on the underlying microstructure.Therefore information on the microstructure is often very helpful for a better understanding of a certain rheological behaviour. The new RheoScope module for the HAAKE Mars offers the possibility to record rheological properties and microscopic images simultaneously.The resulting measurements and pictures can be clearly correlated.