Informationen über DMTA Dynamic Mechanical Thermal Analysis
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, sinusoidal mechanical straining of a sample, measurment of phase shift between the amplitude of interaction and distortion (draw, flexure, shear strain) respectively torsional moment and shearing angular (torsion), determination of E and G modulus (E*, G*) (known sample geometry) and of tanδ, determination of temperature and frequence dependency of storage modulus (E', G'), loss modulus (E'', G'') and mechanical loss factor (tanδ), analysis of dynamical glass transition and lateral relaxation regions, analysis of the phase structure of multiphase polymeric materials, determination of cross-linking densities (from the height of the rubber plateau modulus), analysis of the influence of absorbed water over the thermo-mechanical properties, analysis of physical and chemical aging, determination of the degree of cure of thermosets, Unit 1 Manufacturer: Polymer Laboratories Type: DMTA MK II Deformation: Shear strain, draw, flexure Temperature range: -140 to 500 °C Heating rate: 0.2 to 20 K/min, Unit 2 Manufacturer: Rheometrics Scientific Type: ARES (Advanced Rheometric Expansion System) Deformation: Shear strain Transducer: Torsion: 0.004 to 20 g*cm (range 1), 1.0 to 2000 g*cm (range 2) (autoranging) Axial force: 2 to 2000 g Stimulation frequence: 1.6 10-4 to 81 Hz Temperature range: room temperature to 600 °C Heating rate: 0.2 to 20 K/min Add-on for Rheo-Optics (measurement of the transmittance, birefringence and dichroism during a rheological measurement at 650nm wavelength), Unit 3 Manufacturer: Rheometrics Scientific Type: ARES (Advanced Rheometric Expansion System) Deformation: Shear strain Transducer: Flexural pivot transducer 0.2 to 200 mNm (torsion) Stimulation frequence: 10-3 to 80 Hz Temperature range: -140/-40 to 600 °C (LN2/air chiller) Heating rate: 0.2 to 20 K/min, Unit 4 Manufacturer: Rheometrics Scientific Type: RSA3 Deformation: Draw, flexure Transducer range: 2.0 to 2000 g (axial force) Stimulation frequence: 1.6*10-4 to 100 Hz Temperature range: -140/-40 to 600°C (LN2/air chiller) Heating rate: 0.2 to 20 K/min
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