The effect of vapor-phase silica on the structuring of the compounded rubber
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Recently, it was found that some compounded rubbers exhibited structural changes; after analysis, this was attributed to the effect of fumed silica. I would like to ask the silicone technology experts here, Dana: which parameters or properties of vapor-phase silica affect the structuring of the compounded rubber? Thank you!!! :handshake:handshake:handshake
Drying loss? Total chlorine? Number of hydroxyl groups?
When silica is added to the compounded rubber, structuring tends to occur. First, care must be taken as adding the powder too quickly can lead to structuring; second, the specific surface area of the silica may be too high or unstable; third, an appropriate amount of anti-structuring additive is necessary.