Dielectric Analysis (DEA), also known as Dielectric Thermal Analysis (DETA), is a technique for monitoring changes in the viscositv and cure state of thermosetting resins, adhesives, paints, composites and other kinds of polymers or organic substances by measuring variations in their dielectric properties. DEA is the most powerful measurement technique for the critical, invisible in-mold curina that dictâtes the quality of a component.
The DEA 288 Ionic offers customized test conditions, available in either a process-implementable "Rack" version or a versatile "Portable" version. For laboratory investigations, a variety of accessories can be used, including a laboratory furnace that can be combined with a UV-light source, as well as a humidity chamber and lab press for precise re-creation of specific conditions.
Designed with ease of sample handling in mind, the DEA 288 lonic requires no spécial sample préparation, unlike many other measurement techniques. With a broad range of sensors available, almost any practical application can be accommodated. These indude spray coating of thin films, application by a drawbar, spreading of low- or medium-viscositv materials, positioning the sensor between layers of a prepreg, dipping the sensor in a liquid, and monitoring in-mold curina processes.
Often, polymers achieve their full performance potential only upon being combined with active additives. Such additives serve to adjust the morphology or the polymer architecture in a targeted manner. With the DEA 288 Ionic, the effectiveness of accelerators, inhibitors, and antioxidants can be measured quickly and reliably, as can the impact of substances such as fillers.