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A method for evaluating the properties of vulcanized silicone rubber

A vulcanized silicone rubber, performance technology, applied in the direction of weighing, measuring devices, instruments, etc. by removing certain components, can solve the problems of poor aging resistance of materials, poor raw materials or process levels, etc., to achieve high accuracy, Human factors have little influence on the effect

Inactive Publication Date: 2017-12-19
STATE GRID XINJIANG ELECTRIC POWER CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some high-temperature vulcanized silicone rubber insulation materials have poor aging resistance due to the raw materials or poor craftsmanship used.

Method used

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  • A method for evaluating the properties of vulcanized silicone rubber
  • A method for evaluating the properties of vulcanized silicone rubber
  • A method for evaluating the properties of vulcanized silicone rubber

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Embodiment Construction

[0025] The preferred embodiments of the invention will be further described in detail below.

[0026] Such as Figures 1 to 4 Shown, a kind of vulcanized silicone rubber property evaluation method of embodiment, comprises the steps:

[0027] 1) Select N samples in vulcanized silicone rubber, and test at N heating rates to obtain N thermal weight loss curves, wherein the i-th heating rate β i Corresponding to the i-th thermogravimetric curve; where, 1≤i≤N.

[0028] In one embodiment, 5 samples of sheds are selected from the composite insulator to be tested, and one thermogravimetric experiment is carried out under different heating rate conditions, and a total of 5 times are carried out. Heating rate β 1 =5°C / min, β 2 =10°C / min, β 3 =15°C / min, β 4 =20°C / min, β 5 =25°C / min, the temperature rise range is 50°C to 800°C. Thus, five thermogravimetric curves of a composite insulator sample are obtained, and the thermogravimetric curve is the relation curve between thermogravi...

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Abstract

The invention discloses a method for evaluating the performance of vulcanized silicone rubber, which comprises the following steps: 1) selecting N samples in vulcanized silicone rubber, and testing at N heating rates respectively to obtain N thermal weight loss curves, wherein the i-th heating rate βi corresponds to the i-th thermogravimetric curve; 2) select M reaction depths in the N thermogravimetric curves, and for the m-th reaction depth, obtain data (β1, T1m), (β2, T2m)...(βi, Tim)...(βN,TNm); 3) Establish a coordinate system of lg(β) about 1 / T, and put the data (β1,T1m), (β2,T2m)...(βi,Tim)...(βN,TNm) in A straight line is fitted on the coordinate system, and the activation energy Ea corresponding to the mth reaction depth is calculated according to the slope of the line; 4) The activation energy Ea corresponding to each reaction depth is calculated in turn, and the relationship between the activation energy Ea and the reaction depth is established Relationship curve; 5) Evaluate the thermal stability and / or aging resistance of the vulcanized silicone rubber according to the relationship between the depth of reaction and the activation energy Ea. This measurement method is less affected by human factors and has high accuracy.

Description

【Technical field】 [0001] The invention relates to a performance evaluation method of vulcanized silicone rubber. 【Background technique】 [0002] Silicone rubber materials are widely used insulating materials in power grid systems. Devices and products made of silicone rubber materials include but are not limited to composite insulators, anti-pollution flashover coatings, cable terminal accessories, etc. [0003] However, silicone rubber is an organic polymer material, which is susceptible to aging due to external environmental stress during long-term operation. High temperature vulcanized silicone rubber is the most widely used insulating material in power systems. Some high-temperature vulcanized silicone rubber insulation materials have poor aging resistance due to the raw materials or poor craftsmanship used. 【Content of invention】 [0004] In order to overcome the deficiencies of the prior art, the invention provides a method for evaluating the performance of vulcani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04G01N17/00
Inventor 李耀中张振泉付豪庄文兵郑子梁贾志东陈灿
Owner STATE GRID XINJIANG ELECTRIC POWER CORP