DEA 288 Ionic
20Pages

Proven Excellence. DEA 288 Ionic - Dielectric Cure Monitoring Method, Technique, Applications Analyzing & Testing

DEA 288 Ionic Opening a New World of Cure Monitoring Clear-Cut Determination of the Curing Behavior Dielectric Analysis (DEA), also known as Dielectric Thermal Analysis (DETA), is a technique for monitoring changes in the viscosity 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 curing that dictates the quality of a component.

DEA 288 Ionic: Portable version (left) and Rack version (right) Customized Test Conditions Development of Optimized Resin Formulations The DEA 288 Ionic comes as either a processimplementable "Rack" version or an all-purpose "Portable" version. For laboratory investigations, several accessories are available: 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...

What You Can Investigate with DEA ∙ Degree of Cure ∙ Gel-Point ∙ Flow Behavior ∙ Reactivity ∙ Cure Monitoring ∙ Diffusion Properties ∙ Glass Transition Temperature ∙ Process Monitoring and Optimization ∙ Aging ∙ Decomposition Effects Dielectric (Thermal) Analysis DEA (or DETA) Technique Without external electrical field Fundamental Principle The functional principle is consistent with that of an impedance measurement. With external electrical field − − Behavior of ions and dipoles inside an external electrical field In a typical test, the sample is placed in contact with two electrodes (the...

Results An outer electric field generated by an excitation voltage is applied to the sample and the response, occurring as a current through the material, is measured. Dipoles will be aligned and the ions will move towards the oppositely charged electrode, which can be seen in ε' and ε'', respectively. Based on the sample's characteristics, a time shift between excitation and response signal is detected that, together with voltage and current, allows for the calculation of dielectric magnitudes. Log Ion Visc. /Ohm.cm In detail, this yields information about: Flow behavior Reactivity Cure...

Modular design Simultaneous multi-channel measurements High data acquisition rate Leading-edge technology DEA 288 Ionic, Rack version Cutting-Edge Technology – The Benchmark for Process Control Two versions of the DEA 288 Ionic are available: Portable Version With up to seven channels, this DEA is the flexible version for your day-to-day work. It can be easily transported between different measurement locations. Rack Version for Integration into an Industrial Process The 19” Rack version is designed for an electrical cabinet. It supports 8 simultaneous measuring channels which can be...

The DEA 288 Ionic covers a wide range of measurement frequencies (from 1 mHz to 1 MHz) in order to accurately determine the changes in dielectric properties during reaction. With their minimum data acquisition time of less than 5 ms, the instruments can even handle fast curing systems such as UV curing. All devices come ready-equipped to be connected to thermocouples (separate or integrated into the DEA sensor) or to resistive temperature detectors (RTDs), so that the temperature data can be collected along with the dielectric information. Each channel has its own input. Key Technical...

High Flexibility BY MEANS OF SENSITIVE AND VERSATILE SENSORS FOR ANY APPLICATION Reusable Coated Tool Mountable Comb Electrode for in-mold applications In order to meet the requirements of a multitude of polymer processing applications, NETZSCH offers a great variety of dielectric sensors. These can be classified as disposable and in-mold sensors. The latter type can be permanently mounted, for example, into a press, a mold or even into a sample holder for both DMA and rheometer. Implantable sensors are designed for one-time use and can be positioned at the desired location within a part or...

For optimal matching to different mold geometries, NETZSCH offers both Monotrode and Tool Mount Sensors in various diameters. The sensors contain an integrated thermocouple. Moreover, they are pressure-resistant and able to withstand temperatures of up to 220°C. By using a rugged cabling (> 20 m; theoretically unlimited in length), it is also possible to measure samples which are located at a considerable distance from the DEA device – for example, for in-process tests. DEA furnace with installed Coated Tool Mountable Comb Electrode Specifications for Available Sensor Types Sensor Type...

Smart Accessories WHICH BRIDGE THE GAP BETWEEN PROCESS DEVELOPMENT AND PRODUCTION Customized Test Conditions For proper simulation of industrialscale processes, NETZSCH provides a series of pertinent add-ons to the DEA instrumentation, such as the laboratory furnace with cooling, laboratory press, and UV lamp for fast curing reactions. DEA 288 Ionic with accessories

MULTI-FUNCTIONAL LAB FURNACE Laboratory tests on Sheet Molding Compounds (SMCs), Bulk Molding Compounds (BMCs) and prepregs can be performed in an environment mimicking processing conditions by using a lab press, which is able to apply heat and pressure to the sample at the same time. The sample itself is either situated directly between the plates (including DEA sensor) or - optionally - in a separate spring mold, equipped with a Monotrode or a TMS sensor. The temperature program of the press can be controlled via the NETZSCH Proteus® software from room temperature up to 350°C. The maximum...

Proteus® Software Comprehensive Measurement and Evaluation Software The measuring part of the software provides the user with a modern, user-friendly operating interface. Proteus® now offers a quick and convenient input assistant for programming all relevant measurement parameters. Colorcoded tabs facilitate data entry and guarantee that no important parameter is forgotten – whether it relates to information about the sample, the temperature/time program or the desired frequencies. Segments can be adapted (time, temperature, frequency) during a running measurement. In addition, a snapshot...