Plastic MaterialDielectric Constant - ε - Acetal 3.7 - 3.9 Acrylic 2.1 - 3.9 ABS 2.9 - 3.4 Nylon 6/6 3.1 - 8.3 Polycarbonate 2.9 - 3.8 Polyester, TP 3.0 - 4.5 Polypropylene 2.3 - 2.9 Polysulfone 2.7 - 3.8 PPO, Modified 2.4 - 3.1 Polyphenylene sulfide 2.9 - 4.5 Polyacrylate 2.6 - 3.1...
Accordingly, when one of the dielectric analyzers discussed above is used to measure tan δ of a material as a function of the angular frequency (ω) of the applied voltage, v(t), a form of spectroscopy is being accomplished, where it is noted that the dielectric constant (relative permitti...
If after cooling, the charges are immobilised, the dielectric will behave as an electrical equivalent of a permanent magnet. This is known as an electret (thermoelectrets in this case). An electret loses its volume charge exponentially but with a very large time constant (order of 100 years...
An improved apparatus for the "on-line" measurement of the dielectric constant or percent moisture of a material such as tobacco moving within the walls of a pipe or chute is disclosed. A differential
antenna is designed to operate in the center frequency of 915 MHz and it is utilized in RFID systems as a base station antenna. The elliptical structure is formed by steel wire and supporting acrylic plastic. The cuboids dielectric resonator is loaded at the inner surface of the proposed ...
Low cost millimeter wave dielectric resonators are made by imbedding a two terminal negative resistance device in a plastic waveguide loaded with a high dielectric constant material. The material of the waveguide may be polytetraflouroethylene, polyethylene, styrene copolymer, epoxy resin or acrylic ...
Dielectric elastomers (DEs) are widely used in soft actuation and sensing. Current DE actuators require high driving electrical fields because of their low permittivity. Most of DE actuators and sensors suffer from high viscoelastic effects, leading to h
(g) Side view of the completed LDRA. Full size image Figure 2c depicts the cured Ecoflex container and cover lid, which were carefully disassembled from the plastic molds. The cured container has a liquid reservoir and an air cavity. Cured Ecoflex 0030 has low dielectric constant (2.02) and...
This is due to the material's polarisation effect in the presence of electromagnetic waves. Variations in dielectric constant, ε′ and loss part, ε″ enhance the dipole moment of the activated carbon, making the material conductive below 10 GHz and low-loss conductive above 10 GHz. Fig. 2...
1.A medical device that is capable of transmitting a radiofrequency signal to and/or receiving a radiofrequency signal from an external device, wherein the medical device comprises at least one component that contains a polymer composition that exhibits a dielectric constant of about 6 or less at...