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Method for analyzing aging degree of silicone rubber according to relative content of silicon hydroxyl

A technology of relative content and degree of aging, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problems that the aging mechanism cannot be well described and the rubber aging mechanism is not in-depth enough.

Inactive Publication Date: 2014-09-17
HARBIN INST OF TECH
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Problems solved by technology

[0004] At present, the research on the aging mechanism of rubber is not deep enough, only simple experiments such as infrared spectroscopy, especially for silicone rubber materials, there is no good index to characterize the aging mechanism, and the aging mechanism cannot be well described

Method used

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Embodiment Construction

[0021] The present invention will be described in further detail below: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following examples.

[0022] A method for analyzing the aging degree of silicone rubber by using the relative content of silanol involved in this embodiment, the specific operation steps are as follows:

[0023] Step 1. Thermo-oxidative aging experiment of silicone rubber

[0024] First, the thermal oxygen accelerated aging test was carried out on the silicone rubber specimens. The fixture used in the experiment is a compression fixture manufactured by the Machining Factory of Harbin Institute of Technology, and its size is 240х30х18mm. The thermal oxygen aging box used in the experiment is the hot air exchange test box provided by Wuxi Kelaimu Environmental Technology Co., Ltd. The size of ...

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Abstract

The invention provides a method for analyzing the aging degree of silicone rubber according to the relative content of silicon hydroxyl, belonging to the technical field of a method for analyzing the aging degree of silicone rubber. The method for analyzing the aging degree of silicone rubber according to the relative content of silicon hydroxyl comprises the following four steps: performing a thermo-oxidative aging experiment of silicone rubber, carrying out X-diffraction photoelectron spectroscopy (XPS) testing and nuclear magnetic resonance (NMR) testing on aged test pieces, analyzing the XPS and NMR testing results, and representing an aging mechanism according to the relative content of silicon hydroxyl. The method fills the blank of research on the silicone rubber aging mechanism, and can be used for predicting the aging mechanism of silicone rubber by analyzing the change of the relative content of silicone hydroxyl according to experimental data of NMR and XPS experiments. The method is a simple and practical silicone rubber mechanism analysis method, and has great significance for studying a silicone rubber aging mechanism in the future.

Description

technical field [0001] The invention relates to a method for analyzing the aging degree of silicone rubber by using the relative content of silicon hydroxyl groups, and belongs to the technical field of methods for analyzing the aging degree of silicone rubber. Background technique [0002] Rubber is a highly elastic polymer material with reversible deformation, which is widely used in the manufacture of tires, hoses, tapes, cables and other rubber products. [0003] Silicone rubber in rubber synthetic materials is a typical semi-inorganic and semi-organic polymer. It has both the heat resistance of inorganic polymers and the flexibility of organic polymers. Therefore, it is used as a rubber sealing material resistant to high heat and low temperature. Widely used in aerospace, aviation and other cutting-edge industries. However, rubber parts are affected by internal and external factors during their service, and their mechanical properties will gradually decline and lose th...

Claims

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Application Information

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IPC IPC(8): G01N17/00
Inventor 刘宇艳刘宇鹏王友善粟本龙周锐崔志博刘强
Owner HARBIN INST OF TECH
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