In the 21st century, the development of the epoxy resin system in the world continues to accelerate, especially with the advancement of technology and the application of epoxy resin composite materials, new inventions and products are constantly emerging.

The composite material using epoxy resin as a matrix resin has excellent mechanical properties, but it exhibits time and temperature characteristics when used at high temperatures for a long time. Static bending and fatigue tests were used to examine the effect of time and temperature on bending strength. The results show that the time-temperature superposition principle is suitable for static bending strength. Compared with pure matrix resin and composite materials, pure resin is the main factor affecting the static strength and temperature characteristics of composites. Fatigue tests show that the time and temperature superposition principle applies to the elastic strength of the original matrix resin.

Graphite-epoxy composite laminates with damping material appear. According to experts, the vibration damping performance of the co-cured elastomeric shock-absorbing material in composite materials effectively improves the damping performance of the material. However, when the damping material does not reach the lamination curing cycle, the vibration-damping performance is often inferior to the secondary bonding. Composites are high. The reason for the difference in vibration damping between co-cured and secondary bonded samples is that the resin penetrates into the damping material. The sample with spacers between the damping material and the epoxy resin is 15.17 to 92.3% higher than the effective coefficient of loss (video rate) for the uncured FasTapell25 co-curing, compared to the co-cured ISDll2 sample without the interlayer At least 168% higher. This damping value is close to the value achieved by the secondary bonding. The results of the study show that most of the viscoelasticity of the damping material is affected by the curing temperature.

Carbon fiber epoxy composites also have new developments. Studies have shown that impurities have an effect on the mechanical properties of carbon fiber reinforced epoxy composites. It is important to control the environmental factors in the manufacturing process and applications whether the sample is first cured or post-cured by impurities (water, seawater, acids, alkalis, and organic solvents). Epoxy resin composites have new varieties available. Among them, Ciba Specialty Chemicals recently manufactured a new two-component epoxy potting compound, Resinfusion 8603, which can be used in aerospace, transportation and marine applications with a gel time of 78 minutes and a low viscosity of 260cP (1cP=10). -3 Pa.s), the resin cures at 25°C for 24 h.