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Property evaluation method of vulcanized silicone rubber

A vulcanized silicone rubber, performance technology, applied in the direction of removing a certain component weighing, measuring device, instrument, etc., can solve the problems of poor aging resistance of materials, poor raw materials or process level, etc., to achieve high accuracy, Human factors have little effect

Inactive Publication Date: 2015-06-17
STATE GRID XINJIANG ELECTRIC POWER CORP +1
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  • 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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  • Property evaluation method of vulcanized silicone rubber
  • Property evaluation method of vulcanized silicone rubber
  • Property evaluation method 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 a 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 thermogravime...

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Abstract

The invention discloses a property evaluation method of vulcanized silicone rubber, which comprises the following steps: 1) selecting N samples from the vulcanized silicone rubber, and testing the samples at N heating rates respectively to obtain N thermogravimetric curves, 2) selecting M reaction depths from the N thermogravimetric curves, and obtaining data (beta 1, T1m), (beta 2, T2m)...(beta i, Tim)...(beta N, TNm) for the mth reaction depth, 3) establishing a coordinate system of lg (beta) relative to 1 / T, fitting the data (beta 1, T1m), (beta 2, T2m)...(beta i, Tim)...(beta N, TNm) into a straight line on the coordinate system, and calculating activation energy Ea corresponding to the mth reaction depth according to a slope of the straight line, 4) determining the activation energy Ea corresponding to each reaction depth, and establishing a relation curve of the activation energy Ea relative to the reaction depths, and 5) evaluating thermal stability and / or ageing resistance of the vulcanized silicone rubber according to a relation between the reaction depths and the activation energy Ea, wherein the ith heating rate beta 1 corresponds the ith thermogravimetric curve. The measuring method is insusceptible to influence of a human factor and high in 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 Applications(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