It is shown that the secondary structure of rubbers filled with carbon blacks can be expressed in terms of the volume of the relaxation kinetic element (V), calculated from the stress relaxation curves. The effect of the type and concentration of carbon black and the extension of the specimen on the quantity V has been investigated. The volume of the kinetic element decreases with increase in the concentration and dispersity of the carbon black. This is associated with an increase in the rubber-filler contact area, which causes the orientation of groups of molecular chains and reduces the size of the deformation unit. As the degree of extension of the specimen increases, V decreases.
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Epshtein, V.G., Chernykh, Z.V. & Ovchinnikova, V.N. Study of the secondary structures of filled rubbers. Polymer Mechanics 3, 701–703 (1967). https://doi.org/10.1007/BF00858746
- Secondary Structure
- Contact Area
- Carbon Black
- Stress Relaxation