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VULCANIZATION AND ITS DEVELOPMENT
Editor:XUAN ZOU  Post Time:2012-06-16  Click:

This article mainly describes the development of vulcanization and explain it in chemical terms.

Vulcanization is named after Vulcan, the Roman God of Fire, as the original vulcanization processes involved mixing the rubber with sulphur and heating for a long time. Although this did introduce crosslinks into the rubber, it also degraded it to some extent, so the finished properties were not very good. A big step forward in vulcanization was the discovery of rubber accelerators in the early 20th Century, initially based on compounds derived from aniline. These accelerators greatly increased the speed with which sulphur could be combined with rubbers, opening up not just the rubber industry to greater development, but also starting the rubber accelerator industry which now can provide hundreds of compounds, some specifically tailored to particular applications.

Vulcanization, also known as cross-linking or curing, is the process where the rubber chains are joined together, increasing strength and elasticity, and reducing the tendency of the rubber to creep when extended. On a molecular level, elastomers exist as single polymer chains. A measure of strength and elasticity is present, through entanglement of the chains, but this strength and elasticity is not high. Vulcanization introduces crosslinks to tie the separate polymer chains together, and this can greatly enhance strength and elasticity.

 

 

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