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[October 2004]
New Temperature Controlled Multi-Function Optical Analysis Cell for Rheometry
Malvern Instruments Ltd (Malvern, Worcs, England) has introduced the new Optical Analysis Cell (OAC) which can be mounted directly on to its Bohlin CVO, C-VOR and Gemini rheometers. The cell is designed to enable rheological and optical measurements to be made simultaneously on a single sample.
Sample temperature is controlled via the Bohlin software. A circulating fluid is used to accurately maintain the required temperature in the range -20°C to +90°C (±0.1°C).
The cell may be used to determine a range of optical properties including: light scattering effects; diffraction measurements; and determination of dichroism and birefringence.
An extensive range of measuring systems is available for use with the OAC: quartz concentric cylinders; quartz upper and lower plates for light transmission (25mm to 60mm diameter); and matt black upper plates for light absorption (8mm to 60mm diameter).
Applications include determination of the stress optical coefficient, analysis of domain structures in liquid crystals and studying the dynamics of structure re-orientation in disperse systems such as emulsions and suspensions.
www.malvern.co.uk
ENDS