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Method for predicting hygrothermal aging performance of silicone rubber

A technology for damp-heat aging and performance prediction, which is used in measurement devices, instruments, scientific instruments, etc., and can solve the problems of uncertainty in test methods, inconsistent test indicators, and expensive time-of-flight secondary ion mass spectrometry test instruments.

Pending Publication Date: 2022-01-21
SHANDONG UNIV
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  • Application Information

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Problems solved by technology

However, the high price of time-of-flight secondary ion mass spectrometry testing equipment has affected the popularization and application of this method.
[0008] To sum up, the current damp heat aging research on methyl vinyl silicone rubber has many shortcomings such as non-uniform test indicators and uncertain test methods. Accurately evaluating and predicting the damp heat aging performance of methyl vinyl silicone rubber has become an important issue. an urgent problem to be solved

Method used

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  • Method for predicting hygrothermal aging performance of silicone rubber
  • Method for predicting hygrothermal aging performance of silicone rubber
  • Method for predicting hygrothermal aging performance of silicone rubber

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Embodiment Construction

[0013] Technical scheme of the present invention is as follows:

[0014] A method for predicting the hygrothermal aging performance of methyl vinyl silicone rubber based on the crosslink density data of silicone rubber, comprising the following steps:

[0015] Set at least 3 kinds of necessary humid heat aging environments, carry out aging tests and intermittently take samples for cross-linking density test, obtain cross-linking density test data, and then use the cross-linking density test data, use statistical methods to get the results of different aging environments Kinetic equation, the aging time is brought into the kinetic equation to calculate, and the obtained data is the degree of aging during the aging time; the kinetic equation formula is In the formula: y is the aging degree of the rubber standard sample, and the ratio of the crosslinking density value at any aging time τ to the crosslinking density value before aging for the crosslinking density; K is the rate c...

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Abstract

The invention relates to a method for predicting the hygrothermal aging performance of silicone rubber, which comprises the following steps: setting at least three necessary hygrothermal aging environments, carrying out an aging test, intermittently sampling and carrying out a cross-linking density test to obtain cross-linking density test data, using the cross-linking density test data, obtaining kinetic equations in different aging environments by using a statistical method, substituting the aging time into the kinetic equations for calculation, and the obtained data being the aging degree at the aging time. The method has the characteristic of being very convenient, the accuracy is remarkably improved, and meanwhile, the time loss of the aging test is reduced.

Description

technical field [0001] The invention relates to the technical field of silicone rubber application, in particular to a method for predicting the damp heat aging performance of methyl vinyl silicone rubber. Background technique [0002] The main chain of the raw rubber (also known as the basic polymer) of silicone rubber is a silicon-oxygen-silicon structure, which makes silicone rubber a special type of rubber material with good mechanical and physical properties, chemical inertness, weather resistance, temperature resistance, and Ultraviolet radiation, biocompatibility and processing performance, the application is very wide. Methyl vinyl silicone rubber is a relatively large type of silicone rubber and is widely used in aerospace, vehicle transportation, mechanical electronics and other fields. [0003] During long-term service or natural storage, silicone rubber will be affected by environmental factors such as heat and oxygen and compressive stress in the service enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/44
CPCG01N33/445
Inventor 卢海峰孙岩张欢许文赵云峰周传健魏浩庞明磊安晨高洋洋
Owner SHANDONG UNIV
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