Fully Automatic Dynamic Mechanical Analyzer (DMA)

VR-7130 Automatic DMA was designed to minimize possible causes of measurement errors and variability by adopting the full automatic system and the unique temperature sensor. In combination with THERMO JETTER, it can measure viscoelasticity down to -90°C (-100°C as an option) without using liquid nitrogen.
A high-polymer material is a viscoelastic material, unlike elastic materials such as metals. In the case of elastic body, strain (response) comes up simultaneously to the given force (input). On the contrary, in case of a high polymer material, time lag will occur between input and response. These relations are different by the sample components and also dependent on temperature, velocity and strain. High polymer materials are used for various uses in various fields by using such characteristics.
As these properties are mainly treated as material properties, response to very minute input (force or strain) will be mainly measured. (Strain is measured to force or force to strain.) The VR-7130 has minimized possibility of human errors and realized excellent precision in viscoelasticity measurement of high-polymer materials.
Possible to load 100 max. samples automatically
Sample chucking, measurement and discharge are automated, thus minimizing human errors.
The temperature difference between the sample and the measurement point was solved by using a thermocouple with a rubber coating of the same thickness as the sample and adopting the step temperature control method.
In the measurement of viscoelasticity, minute deformations such as several μm to several tens of μm are measured, so the rigidity (deflection) of each component affects the test results. The DMA adopts a piezoelectric load cell to minimize deflection of the load cell itself, realizing more precise load measurement.
The compact body minimizes the influence of resonance and realizes accurate measurements within the measurement frequency of 0.1 to 200Hz (except for the character frequency of the sample).
Thermo Jetter cooling system enables measurement at low temperature down to -90°C(-100 °C as an option) without using liquid nitrogen
Direct calculation of the phase realizes improve measurement accuracy.
Master curve is available optionally.
Frequency: 0.1 to 200Hz (Variable)
Maximum load: 200N (with Load cell ±450N)
APPLICATIONS
 Simulation of product property by test pieces
 Tire: Abrasion/Friction/Rolling Resistance/Evolution of heat etc.
Car: Ride/Vibration-proof performance/noise
Other Vibration control and/or suppression/Sealing ability………
 Molecular structure/degradation level etc.
MEASUREMENT MODES
 Fixed point measurement
 Temperature dispersion
 Frequency Dispersion
 Strain dispersion
MEASUREMENT ITEMS
 Absolute complex modulus［E✽］
 Storage modulus E’
 Loss Modulus E’’
 Tangent delta tanδ
SOFTWARE
 Database software
 Management of testing conditions
 Management of testing results
 Management of equipment conditions
 Data backup
Measurement software
Test Condition Input Screen
 Choice of testing mode：Fixed point measurement, Temperature dispersion, Frequency dispersion, Strain dispersion etc.
 Setup of testing conditions：Testing temperature, frequency and strain
 Sample conditions：Thickness, Breadth
Testing Screen
 Real time indications while testing（Graph and numeric display）
 Present conditions are available by status display. Error handling is easy also
 Reporting output and text conversion（CSV form） after testing are possible
Master curve software
Viscoelasticity at high-frequency, under impossible conditions for actual testing,  can be estimated by experimental formula
 Low temperature property ⇒ High-frequency property
 High temperature property ⇒ Low-frequency property