环氧树脂的尽缘性能应用资料(国外英文资料).docVIP

环氧树脂的绝缘性能应用资料(国外英文资料) The characteristics of epoxy resin in the field of electrician insulation In the late 1940s, epoxy resin began to be applied to electrician insulation, which has a history of more than fifty years. Bisphenol A epoxy resin/acid anhydride system is the main variety of insulation pouring materials of current transmission and transformer equipment, its advantages are outstanding: U has good adhesion; Low shrinkage in u curing process; U does not produce small molecules in the curing process; U heat resistance and good drug resistance; High mechanical strength; U electric insulation is excellent. But the downside is obvious: U brittleness is big, anticracking performance is bad: if the product is cast after the craze, the storage period is cracked, the low temperature is cracked, and it cracks in the running of the line. U brittleness often lead to equipment performance is not up to standard: such as partial discharge is not up to standard, resistant to cold and hot shock is not up to standard, dynamic thermal stability is not up to standard, insulator bending force is not up to standard, etc.; As the performance of the transmission and transmission equipment has been improved, the problem has become more and more obvious. Such as: The problem of stress concentration in the complex transmission and transmission equipment and components is obvious, and it is easier to crack. 2, equipment use more harsh conditions, such as the need to endure extreme temperature impact, to adapt to the power grid operation fluctuation, improve the thermal stability, ensure the quality of long-term, partial discharge reduction, etc. Analysis of force of epoxy resin insulation layer The reason for the above problem is that the epoxy insulation materials are used in the manufacturing process of transmission and conversion equipment, and they will be affected by a variety of forces: The contraction stress due to the contraction of chemical reaction during the curing proce