Calculation method and device for thermal analysis of polymer materials in variable temperature field

Abstract

The invention provides a thermal analytical calculating method and device for a high molecular material in a variable temperature field. The method comprises the following steps: analyzing the rule ofa time-dependent heat injury performance index of the high molecular material in an aging process and establishing a performance index change equation of the high molecular material; establishing a simulation experiment model of the high molecular material in the variable temperature field and solving the numerical value of the simulation experiment model by means of a finite element method to obtain a numerical value relationship between thermodynamic temperature and aging time of the high molecular material; and introducing the numerical value relationship between thermodynamic temperatureand aging time of the high molecular material into the performance index change equation of the high molecular material to obtain a quantitative relationship between the heat injury performance indexand the aging time of the high molecular material. According to the invention, an aging experiment research of the high molecular material in a slow variable temperature condition can be achieved, theobtained data is of reference value, and the integral operation is feasible.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and more specifically, to a method and device for thermal analysis and calculation of polymer materials in a variable temperature field. Background technique [0002] As a common physical and chemical phenomenon, aging has always existed in various materials, and the aging of polymer materials is an important issue that affects whether its performance is safe and reliable. Polymer materials are easily affected by the mechanism of heat to accelerate the degradation of polymer compounds, change their microstructure, and reflect changes in physical and mechanical properties macroscopically. [0003] At present, there are mature methods for studying the effects of aging on polymer materials under constant temperature conditions, the most common of which are accelerated aging test methods and computer simulation methods. The deviation of the results is huge, and it is difficult to directly ...

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Problems solved by technology

[0003] At present, there are mature methods for studying the effects of aging on polymer materials under constant temperature conditions, the most common of which are accelerated aging test methods and computer simulation methods. The deviation of the results is huge, and it is difficult to directly test the mechanical properties of polymer materials caused by aging under this condition

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