Miniature stretching rheological device for in-situ structure detection of polymer film material, and experimental method thereof

Abstract

The invention provides a miniature stretching rheological device for in-situ structure detection of a polymer film material, and an experimental method thereof. Accurate temperature control and high-speed deformation of a polymer film sample are achieved in a limited space; strain and strain rate can be accurately controlled and continuously adjusted at the same time; the device adopts a brushless servo motor of a hollow core cup to drive a driving shaft to rotate; a stretching rheological operation is exerted on the sample; the rotating speed and displacement of the motor are accurately controlled by Labview control program combined with a hall sensor and an encoder of a motor; a driven shaft of the device is connected with a miniature tension sensor; and the change of tension in the stretching rheological process is tracked in real time. The miniature stretching rheological device has the advantages of being small in volume, light in weight, convenient to install, suitable for collocation with equipments such as a microfocus X-ray diffraction station, an optical microscope, and a Fourier transform microscopic infrared spectrograph, and is a good device for in-situ research of internal structure change in the high-polymer material stretching rheological process under different temperature conditions.

Description

technical field [0001] The invention relates to the technical field of in-situ research on the relationship between the structural evolution of polymer film materials and the parameters of the external flow field by using various detection technologies, and specifically relates to a micro-extensive rheological device for in-situ structure detection of polymer film materials and its experiment The method can study the structural evolution behavior of different types of polymer film samples under different experimental temperatures, different extensional rheological rates and strain conditions, and obtain the crystallinity, orientation degree, crystal morphology, and structural relaxation of polymer film samples under different conditions. , crystallization kinetic information and tensile mechanical data, revealing the relationship between the external flow field parameters and the structure of polymer materials. Background technique [0002] Flow field-induced polymer orderin...

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Problems solved by technology

Micro-focus X-ray diffraction, optical microscopy, and Fourier transform micro-infrared spectroscopy are very good techniques for in-situ polymer material morphology and structure research, with high time and space resolution, but due to the limited space of the instrument and sample chamber Due to size limitations, it is difficult to combine with in situ rheological experimental devices

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