Full-automatic polyethylene environmental stress cracking resistance testing method and device and application thereof
A technology of environmental stress resistance and testing equipment, which is applied in the direction of measuring equipment, test sample preparation, weather resistance/light resistance/corrosion resistance, etc., can solve the problems of manpower and material resources, low economic benefit, cumbersome operation, etc., and reduce manpower The effect of investing material and financial resources, improving the degree of automation, and avoiding test errors
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no. 1 example
[0034] first embodiment ,refer to figure 1 , an example of a fully automatic polyethylene environmental stress cracking resistance test device designed by the present invention, including: pressure head 1, fixed piece 2, pressure cup 4, first electrode 6, second electrode 7, power supply 8, resistance 9, without Paper recorder 10 and data processing device 11. in:
[0035] The pressure cup 4 is a cup-shaped structure and can conduct electricity (material is 316 stainless steel), and the pressure head 1 is arranged above the pressure cup 4 . The main function of the indenter is to perform indentation treatment on the sample 3 to be tested, so as to replace the method of prefabricating the crack gap on the test sample in the traditional test method. The test error caused by the unstable quality of the crack notch can significantly improve the repeatability and accuracy of the test results. In addition, the specific device for indentation treatment can refer to the "Environm...
no. 2 example
[0039] second embodiment , a kind of full-automatic polyethylene environmental stress cracking resistance test method, adopts the device described in embodiment 1 to carry out, comprises the steps:
[0040] (1) Before the test, the indenter is fixed on the external loading device (Shenzhen Sansi Electronic Universal Testing Machine, model UTM5504X), and then the sample 3 to be tested (plate-shaped rectangular polyethylene) is placed on the upper port of the pressure cup 4, passed The fixed piece 2 compresses the sample to be tested on the pressure cup to prepare for indentation treatment.
[0041] (2) The loading device is turned on, and as the indenter 1 passes through the through hole on the fixed plate 2 to press the sample, the sample is pressed down into the pressure cup to form a cup-shaped sample, but the cup-shaped sample cannot produce cracks at this time; Make the corrosive solution (Igepal CO 630 solution) located under the cup-shaped sample in the pressure cup co...
no. 3 example
[0048] third embodiment , a fully automatic polyethylene environmental stress cracking test method, the same as Example 2, the difference is: the temperature of the constant temperature condition is 100 ° C, the corrosion solution used is an aqueous solution of nonylphenol polyoxyethylene ether, and its concentration is referred to GB1842-2008 preparation.
[0049] After testing, under the above test conditions, the difference between T1 and T2 is 2166 seconds (about 0.6 hours), that is, the crack generation time is 2166 seconds.
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