A Coplanar Capacitive Polymer Molecular Orientation Measuring Device and Method

Abstract

A coplanar capacitance-type polymer molecule orientation measurement device and method, the measurement device comprising: a sensor probe array (10), a capacitance measurement unit (13), and an orientation computing module (14); the sensor probe array (10) comprises multiple groups of coplanar electrodes, any group of coplanar electrodes comprising at least two conductive electrodes; the capacitance measurement unit (13) is used for measuring the capacitance between any two conductive electrodes from within the same coplanar electrodes, and for obtaining multiple groups of capacitance data; the orientation computing module (14) is used for computing, according to the multiple groups of capacitance data, the molecular orientation of a polymer to be measured. By using the anisotrophy of the dielectric properties of a polymer material, polymer molecule orientation is measured by means of a coplanar electrode structure, thus establishing a relationship among orientation–dielectric–capacitance. The present invention is suitable for various polymers, and is a nondestructive type of detection having the features of high precision, rapid response, being non-invasive, and the like.

Description

technical field [0001] The invention belongs to the field of polymer processing and forming process detection, and more specifically relates to a coplanar capacitive polymer molecular orientation measurement device and method, which can be used to measure the molecular orientation in the polymer forming process. Background technique [0002] Polymers have various excellent properties such as abundant raw materials, easy processing, high specific strength, and chemical corrosion resistance, so they have been widely used in various industries. During the polymer molding process, the polymer molecular chains are oriented with the flow behavior of the melt, and show a certain orientation distribution according to the shear of the melt. The final distribution and change history of the orientation of polymer molecules determine the mechanical properties, optical properties and thermophysical properties of polymer products. Therefore, the measurement of molecular orientation during...

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the purpose of the present invention is to propose a coplanar capacitive polymer molecular orientation measurement device and method, wherein through the relative arrangement of the key sets of coplanar electrodes in the measurement device, The shape and relative position of the conductive electrodes in each group of coplanar electrodes are improved, as well as the type of parameters measured. Compared with the existing technology, it can effectively solve the difficulty of measuring the molecular orientation of polymers, and the measurement method is only applicable to some specific shapes. The problem of polymers, etc., the present invention uses the anisotropy of the dielectric properties of polymer materials to establish the relationship between orientation-dielectric-capacitance, which is suitable for all kinds of polymers, belongs to non-destructive testing, and has high precision and fast response , non-invasive, etc., and the measuring device and method can be used for online measurement of polymer molecular orientation in a real processing environment, with high flexibility and wide application range

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