Glass insulator silicone rubber molecular structure mechanically

    Glass insulator silicone rubber molecular structure and mechanical properties of low, directly on the hard outer insulation, the use of silica must be reinforced. Fumed silica and precipitated silica compared with a compact, uniform particle distribution, no air gap, good thermal stability, good reinforcing effect, free of impurities and other special power-up, the outer insulation is widely used, "fumed carbon After the black particles are uniformly distributed through the mastication silicone molecules, which may canthus van der Waals surface, oxygen bond or bonds of the silicone molecules interconnected silicon rubber vulcanization, chemical cross-linking of the silicone molecules and bond forming mutually entangled around the fumed silica particles in which a stable network structure, thereby increasing the strength of the silicone rubber, fumed gray orthosilicate by a series of condensation dehydration reaction, various stages in the reaction has remained -OH. Its particles inside although there -OH difficult to remove, but the impact of the ceramic insulator silicon rubber performance is not to -OH fumed silica particle surface are mostly independent existence, high reactivity, greater impact, first fumed silica during storage of water molecules in the air easily and particle surface OH Health Qi hydrogen is adsorbed at room temperature can be several monolayer adsorption. Bitter such as silica adsorbed water into the outer insulated closed system did not break out, it will break the silicone molecules, the polymer degradation directly affects the performance of a second anti-aging, silica particle surface caused by too much acidic -OH performance is too large, although in normal conditions -F is difficult to make the silicone molecules silicone strand breaks, but under certain catalytic conditions, but also make silicon-oxygen bonds are lower than the carbon-silicon bond can be much different breaking key phenomenon. This is because the silicon-oxygen bond pole sex and silicon atom radius, different chain scission cracking phenomenon induced effects long-term effects of acidic silica results in two silicone rubber molecules appear in the acidic effects of silica particles, some silicone-free state can be split into different small molecules, which may help to maintain the water-repellent outer insulating material migration performance, but too much will affect its overall performance seen by a silica composite insulators as external insulation reinforcing filler, although -OH particle surface and the overall bias is the inevitable presence of acidic properties of molecular structure itself, but a means strict inspection side. its control in the presence of a certain degree, this is not only beneficial to the outer insulation anti-aging properties, it can also be appropriate to maintain the water-repellent outer insulation can migrate Pi Zeng External insulation were 250aC x 168h aging test, filling the acidic pH of 59 large white carbon outer insulating weightlessness pH value of less than 395 1/2