Chemically active by-products formed by corona discharge in SF<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6gas are prone to damaging the exposed epoxy resin

or even leading to an entire insulation failure of the operational GIS/GIL power equipment. In this proposed research

reactive force field molecular dynamic simulation methodology is applied to investigate the chemical reaction kinetics of epoxy polymer under the impact of highly energetic particles (F

S

SOF

SF

OH and O) so as to explain the degradation mechanism. Among all cases

SF particle-impacted epoxy resin suffers the most serious surface erosion with the lowest remnant mass of 9% and deepest damage penetration of 32.6Å

to which the S particle-caused damage showed similar results. Due to high reactivity of the S atom

it can merge into the epoxy molecules to promote long chain breaking

causing a six-membered ring opening and further dissociation of short carbon chains

which makes the epoxy resin molecules undergo faster spontaneous dissociation with increased temperatures. The changes of small molecular gas products

such as CO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2

H<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2O and CH<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2O

as well as that of the characteristic products

such as HF

CS<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2

SO and H<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2S

are also evaluated under the impact of different particles. The presented research indicates that enhancing the resistance strength of epoxy polymer against S and SF particles' corrosion is the key approach to improving chemical stability in the SF<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6environment. Further studies were implemented to optimize the concentration and diameter of nano-Al<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2O<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3 doped in the composites. According to this paper

aluminum nanoparticle with a diameter of 1nm could significantly reduce the erosion caused by SF and S particles. The micro-scale mechanism lies primarily within two aspects: the nanoparticles improve the surface heat transfer efficiency as to reduce temperature rise

and also provide an effective protection area by balancing distribution and self-exposing

which finally slows down the pyrolysis process of epoxy resin

as well as the reaction intensity with the incident particles.