Group: NETZSCH
Catalog excerpts
GABO DiPLEXOR® Simultaneous Dielectric (DEA) and Dynamic Mechanical Analyzer (DMA) Methods, Instrumentation, Applications
Open the catalog to page 1GABO DiPLEXOR® The Perfect Combination of DEA and DMA * DiPLEXOR® only registered in Europe
Open the catalog to page 2With simultaneous DMA and DEA, the dynamic mechanical and dielectrical properties of carbon black-filled rubber compounds can be analyzed. Simultaneous dielectric (DEA) and dynamic mechanical (DMA) analyses allow for the determination of dielectric material properties under different mechanical loads. With this combination, structural and dynamic mechanical information can be obtained. The DMA part investigates the viscoelastic properties of substances such as carbon black-filled rubber blends and compounds. The DEA part analyzes the intrinsic structure and distribution of the cluster...
Open the catalog to page 3The Dynamic Mechanical Analysis Method – DMA % ar s line alyze propan OR® rial iPLEX ear mate nging eD n ra Th on-li oads high. and n s under l to ertie very low m fro Stress (Input) Strain (Output) Phase shift δ Dynamic Mechanical Analysis (DMA) measures the viscoelastic properties of polymers, elastomers, rubber compounds, etc., during a controlled temperature and/or frequency program. During the test, a sinusoidal force F (stress σ) is applied to the sample (input). This results in a sinusoidal deformation (strain ε) (output). The mechanical frequencies usually range from 10-3 Hz to 100...
Open the catalog to page 4The Dielectric Analysis Method – DEA DEA explores the dielectric structure of materials by applying a sinusoidal voltage to two electrodes (electrical capacitor). The frequency of the sinusoidal voltage ranges from 10-2 Hz up to 107 Hz. A sinusoidal alternating voltage with variable frequency (up to the MHz range) is applied to the upper plate of the compression holder. The upper and lower holders act as a perfect plate capacitor. The specimen (e.g., elastomer) acts as the dielectric. An AC current flows through the specimen and is measured. From the adjusted voltage and the recorded...
Open the catalog to page 5How Does a DMA Measurement Determine the Suitability of a Seal for Use? 0.2 Dynamic strain / % Cole-Cole equation Stiffness and damping of two different elastomeric systems depend on the applied dynamic strain. of uction 1.3E+07 l destr rk due Partia netwo 1.2E+07 er d the fill ε* sing preloa e 1.1E+07 ncrσ*a to i This plot exhibits tests on HNBR samples with different levels of carbon black N550 content. Each sample was compressed by 10%, 20% and 30%. The conductivity increases with increasing filler content. However, conductivity decreases with increasing static deformation. In the case...
Open the catalog to page 6Dynamic strain / % Permittivity Provides Information About Carbon Black Structures This plot shows the influence of the dynamic force on an SBR sample: An increasing dynamic force results in decreasing conductivity and permittivity. Cole-Cole equation Based on the Debye equation, the semi-empirical Cole-Cole, ColeDavidson and Havriliak-Negami equations were developed. They allow for simulation of the permittivity. With the support of computer-aided fit programs, these mathematical techniques can identify the most important fitting coefficient: the relaxation time, which indicates the size...
Open the catalog to page 7The NETZSCH Group is an owner-managed, international technology company with headquarters in Germany. The Business Units Analyzing & Testing, Grinding & Dispersing and Pumps & Systems represent customized solutions at the highest level. More than 3,700 employees in 36 countries and a worldwide sales and service network ensure customer proximity and competent service. Our performance standards are high. We promise our customers Proven Excellence - exceptional performance in everything we do, proven time and again since 1873. When it comes to Thermal Analysis, Calorimetry (adiabatic &...
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