EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of DIN 53752 testing. The methods described in this standard are used to determine the coefficient of thermal linear expansion of rigid plastics (hereinafter referred to as the coefficient of linear expansion) as a function of temperature (method A) or as two-point measurements under certain conditions.
With this test, the reversible thermal change in length should be determined, as far as possible, by excluding irreversible changes in length. In general this will not be entirely possible, so this determination can only give an approximation of the true reversible thermal length change.
The dilatometer must ensure that, at any temperature, the length variation of the sample is not deformed by the measuring force of the measuring device or bent in its support during measurement.
The case of the temperature measuring device must ensure that the temperature at the location of the sample is determined with a maximum deviation of ± 0,2 K. The temperature measuring device must also be suitable for measuring temperature changes At corresponding to Al length changes with allowable error limits.
The shape of the sample depends on the dilatometer used. It should be ensured that the sample cross-section (with a certain modulus of elasticity of the molding material in a given sample length and temperature measuring range) is large enough to eliminate compression and bending during measurement, but not larger. A sufficiently homogeneous temperature distribution in the sample is guaranteed at a given heating rate.
If you want to evaluate a continuous measurement (method A) according to Equation (1), it is recommended that you use a computer that divides the length variation curve according to temperature (or time) in online operation and the Differential coefficient divided by the value. reference length If no computer is available, the length variation curve, which is continuously recorded over temperature, can also be evaluated intermittently.
EUROLAB assists manufacturers with DIN 53752 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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