Method for detecting water content of epoxy resin and application thereof
A technology of epoxy resin and detection method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of poor reliability, cumbersome detection process, damage, etc., and achieve the effect of accurate acquisition and simple and efficient detection process
Pending Publication Date: 2022-07-12
CHONGQING UNIV
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Problems solved by technology
[0003] Aiming at problems such as cumbersome detection process, low efficiency, poor reliability and affecting the normal operation of electrical equipment or even causing damage in the current detection process of epoxy resin water absorption in electrical equipment, the present invention provides a detection method for the water content of epoxy resin
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Embodiment 1
[0048] A method for detecting water content of epoxy resin, comprising the following steps:
[0049] (1) Take the newly purchased bisphenol A epoxy resin (DGEBA) as the standard sample, the thickness of the standard sample is 1mm and the diameter is 10mm, the standard sample is wiped with ethanol, and then placed in an environment of 22 ℃ for ventilation Treatment, the average wind speed is 0.2m / s, to dry the standard sample. Set up multiple sets of standard samples, the water contents of the standard samples are 0.55844, 0.552, 0.52673, 0.41212, 0.40612, 0.35897, 0.21525 respectively.
[0050] (2) The detection system 10 is used to detect the absorption peak intensity at 1.9 THz for the standard sample, and the detection results are shown in Table 1.
[0051] Table 1 Relationship between absorption peak intensity and water content of epoxy resin standard sample at 1.9THz
[0052] standard Moisture content (%) Characteristic peak intensity (Arb) 1 0.55844 ...
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The invention relates to the technical field of epoxy resin water absorption detection, and particularly provides a method for detecting the water content of epoxy resin. The detection method comprises the following steps: providing epoxy resin standard samples, wherein the water contents of the epoxy resin standard samples are different; detecting the absorption peak intensity of each epoxy resin standard sample at 1.9 THz by adopting terahertz; according to the water content of each epoxy resin standard sample and the absorption peak intensity at 1.9 THz, drawing a standard curve that the absorption peak intensity changes along with the water content; carrying out absorption peak intensity detection at 1.9 THz on the to-be-detected sample by adopting terahertz detection to obtain an absorption peak intensity value of the to-be-detected sample; and substituting the absorption peak intensity value of the to-be-detected sample into the standard curve, and calculating to obtain the water content of the to-be-detected sample. The detection method can rapidly obtain the water absorption capacity of the epoxy resin in situ and has no damage to the epoxy resin.
Description
technical field [0001] The invention belongs to the technical field of water absorption rate detection of epoxy resins, and particularly relates to a method for detecting the water content of epoxy resins and applications thereof. Background technique [0002] Epoxy resin is often used as a packaging and pouring material for electrical equipment due to its high dielectric strength, excellent chemical properties, and good environmental adaptability. However, the intrusion of moisture will accelerate the aging of epoxy resin materials used in electrical equipment, thereby reducing the insulation performance, and ultimately the performance of electrical equipment and even potential safety hazards. In the prior art, the weight change of epoxy resin in electrical equipment is measured by weighing method to judge the degree of moisture intrusion. However, the weighing method has many limitations. For example, the electrical equipment needs to be removed, or the electrical equipme...
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Login to View More IPC IPC(8): G01N21/3554G01N21/3581
CPCG01N21/3554G01N21/3581
Inventor 成立刘云帆张思达陈荣新杨丽君廖瑞金
Owner CHONGQING UNIV