The epoxy based composite materials with a high ageing resistance property have attracted a wide attention in the field of high-electric-insulation electronic packaging. However, both of the highly retained electrical and mechanical performances are difficult to simultaneously achieve in composite materials once a longer heat-oxygen ageing at a high temperature is applied onto the materials. In order to realize the ageing-resistant high mechanical, electric breakdown and dielectric properties simultaneously in composite, in this work, an epoxy based composite filled with the high-insulation micron-sized glass fiber filler has been prepared, and its shock resistance strength, electric breakdown strength, dielectric constant, dielectric loss and conductivity after a severe heat-oxygen ageing have been investigated in detail, compared with that before the ageing. Although the ageing was operated at 150 °C for 25 days, the electric and mechanical properties of the composite were still finely retained, including 60% retention for shock resistance strength, 70% for breakdown strength, 80% for dielectric constant, dielectric loss below 0.1 and conductivity below 2 × 10−9 S cm−1. The epoxy matrix and glass fiber filler were responsible for the small decline and high retention for the properties in composite, respectively. This work might open the way for the large-scale preparation of the promising epoxy based composites with the highly retained ageing-resistant electric and mechanical properties based on incorporating the high-insulation fiber fillers.
Electric Mechanical Fiber Composite Ageing
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This work was financially supported by the Talent Introduction Scientific Research Initiation Projects of Yangtze Normal University (Grant Nos. 2017KYQD33 and 2017KYQD34) and the National Natural Science Foundation of China (Grant No. 51502309).
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Conflict of interest
The authors declare that they have no conflict of interest.
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