Coplanar capacitor type polymer molecular orientation measuring device and method

Abstract

The invention discloses a coplanar capacitor type polymer molecular orientation measuring device and method. The measuring device comprises a sensor probe array (10), a capacitance measuring unit (13) and an orientation calculation module (14), wherein the sensor probe array (10) comprises multiple groups of coplanar electrodes; any one group of coplanar electrodes comprises at least two conductive electrodes; the capacitance measuring unit (13) is used for measuring capacitance between any two conductive electrodes in the same coplanar electrode and acquiring multiple groups of capacitance data; and the orientation calculation module (14) is used for calculating molecular orientation of a to-be-measured polymer according to the multiple groups of capacitance data. According to the device and method disclosed by the invention, the molecular orientation of the polymer is measured through the coplanar electrode structure by utilizing anisotropism of dielectric properties of polymer materials, the orientation-dielectric-capacitance relationship is established, and the device and method are applicable to various polymers, belong to nondestructive testing and have the characteristics of high precision, fast response, non-invasive type 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...

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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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