Testing machine with broadband amplitude vibration test/rheological measurement integrated function

Abstract

The invention discloses a testing machine with a broadband amplitude vibration test / rheological measurement integrated function. The testing machine comprises a mold assembly, a broadband amplitude vibration assembly and a rheological measurement assembly. High-amplitude and low-frequency mechanical vibration and high-frequency and low-amplitude ultrasonic vibration jointly act to form a broadband amplitude vibration field, the shear viscosity of melt is measured based on the principle of a capillary rheometer, and the broadband amplitude vibration test / rheological measurement integrated function is integrated for the manufacturing process of a polymer fine structure. The testing machine plays an important role in systematically researching the orientation and disentanglement action rule and mechanism of a composite vibration synergistic external field condition on a polymer microstructure, and can be used for online obtaining the polymer structure and rheology under broadband amplitude vibration in a fine-scale viscoelastic non-Newtonian chaotic flow field; and mutual competition and synergistic effect rules of a plurality of vibration modes in micro motion of polymer molecules are disclosed. The shearing vibration frequency applied by the testing machine is wide, the processing time is short, and the processing efficiency and the mechanical property of the polymer can be improved.

Description

technical field [0001] The invention relates to the field of polymer microstructure manufacturing, in particular to a testing machine with integrated broadband vibration testing and rheological measurement functions. Background technique [0002] Polymer products containing micro-scale dimensional precision microstructures, including rocket high-pressure sealing valve cores, radar radomes, composite fasteners, etc. used in aerospace and military applications, wear-resistant bushings and wear-resistant gears used in the automotive industry , non-pneumatic wheels, car lights, etc., capillaries, variable diameter straight-through, injection valves, etc. used in precision instruments, precision connectors, spectrometers, optical lenses, optical fiber connectors, light guide plates, anti-reflection optical panels in the field of communication , grating, data storage disk and other parts, with the advantages of light weight, high added value and outstanding performance. In additi...

AI Technical Summary

Problems solved by technology

[0006] In view of the fact that the existing equipment cannot obtain new data on the structure and rheology of polymers under wide-band vibrations in the fine-scale viscoelastic non-Newtonian chaotic flow field, and cannot discover new phenomena of polymer molecular orientation and disentanglement induced by wide-band vibration shearing, and cannot To reveal the deficiencies of the competition and synergistic rules of various vibration modes in the microscopic movement of polymer molecules, the present invention proposes a testing machine with integrated wide-frequency amplitude vibration test / rheological measurement functions, using low-frequency and high-amplitude mechanical vibration Superimpose high-frequency and low-amplitude ultrasonic vibrations to obtain a wide-frequency vibration field, and use the principle of a capillary rheometer to measure the viscosity of the polymer to achieve high-efficiency orientation and unentanglement of the polymer while monitoring the viscosity of the polymer during flow

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