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Study of polymeric composites by Dielectric spectroscopy (CAT#: STEM-ST-0362-WXH)

Introduction

Polymer composites are polymer materials with a reinforcement, in which the polymer acts as a matrix resin that penetrates the reinforcement bundles and bonds to the reinforcement. Polymer composite materials are used mainly in automotive and aerospace applications, and this chapter focuses on automotive polymer composites, the most common of which is polyester polymer resin.




Principle

The principle of this technique is to apply an AC signal of small amplitude to an electrode immersed into an electrolyte. The initial disturbance (applied) and the response of the electrode is compared by measuring the phase shift of the current and voltage components and by the measurements of their amplitudes.

Applications

Used to study the response of a sample subjected to an applied electric field of fixed or changing frequency. DS describes the dielectric properties of a material as a function of frequency.

Materials

Dielectric spectrometer