Adding accelerators to rubber can promote the reaction between the rubber and the vulcanizing agent, increase the vulcanization speed, reduce the vulcanization temperature, shorten the vulcanization time, and reduce the amount of the vulcanizing agent.
Different rubbers use different vulcanization systems and different accelerator types.
Accelerator plays a decisive role in coke performance, and the correct choice of accelerator is helpful for compound mixing, calendering, extrusion and operation safety. Generally, molding vulcanization requires a certain scorch time, while mold-free vulcanization does not require a long scorch time.
The anti-scorch performance of the accelerator is related to its critical temperature. When the critical temperature is exceeded, the accelerator activates rapidly. When a variety of accelerators are used together, some accelerators will be inhibited, and some accelerators will also show greater activity at the critical temperature. .
The combination of accelerator should make the compound have broad vulcanization flatness. Rubber is a poor thermal conductor, and the internal heating conditions of the rubber surface are not constant. The broad vulcanization flatness is the guarantee to avoid over-sulfurization and to make all parts of the product vulcanized evenly.
The reasonable combination of accelerators can also improve the aging performance of the vulcanizate, and has a certain plasticizing effect, which can improve the processing performance of the rubber compound. Disadvantages: poor dispersibility of accelerators, contamination, and currently used accelerators are generally non-toxic.
Disclaimer: The picture materials and articles on this platform are from the Internet, so the copyright belongs to the original author. If your copyright and interests are infringed, please contact us, we will apologize and delete it quickly. Article source: Rubber Technology Network
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