Device and method for testing terahertz dielectric properties of sheet-like polymers

Abstract

The present disclosure provides a terahertz dielectric characteristic testing device and method of a sheet-like polymer, including a clamping mechanism, a position moving mechanism, a first support and a laser rangefinder; the clamping mechanism includes a The first plate and the second plate that clamp and fix the sheet-like polymer, the two sides of the clamping mechanism are respectively provided with a first lens opposite to the first through hole and a second lens opposite to the second through hole. Opposite to the second lens, the terahertz signal is transmitted in parallel to the sheet polymer at the position of the first through hole respectively through the first lens and the second lens; a laser rangefinder is fixed on the side of the lens, so The emission surface of the laser rangefinder is coplanar with the lens surface, and the laser rangefinder is used for position adjustment of the clamping mechanism and for determining the thickness of the sheet-like polymer; the disclosure is simple to operate and can be used for different sizes and thicknesses The sheet-like polymers were tested.

Description

technical field [0001] The present disclosure relates to the technical field of testing terahertz dielectric properties, and in particular to a device and method for testing terahertz dielectric properties of sheet-like polymers. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] There are many kinds of high molecular polymer products, which are widely used in a wide range of fields, for example, they are widely used in automobile tires and cables. During long-term use, high-molecular polymer products are inevitably eroded and damaged by external conditions such as heat, light, salt spray, and ozone, resulting in aging. From the perspective of material microstructure, the aging of polymers is a change in its molecular structure, such as molecular chain breakage, re-crosslinking, etc., coupled with the invasion of external elements such as ...

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Problems solved by technology

[0005] The inventors of the present disclosure have discovered that polymer products are mostly soft materials, and samples made of thin slices are not easy to stand upright, and most polymer products may become soft and sticky after being aged by artificial thermal oxygen, ultraviolet rays or ozone. , may also become hard and brittle, and the surface is deformed, so this puts forward higher requirements for the positioning of the polymer sample testing system. At present, there is no better device or method for polymer positioning.

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