Why is vulcanisation done

Synthetic rubbers are Elastomers , elastic properties of which are similar to those of the natural rubber. Synthetic rubber may have chemical composition similar to the natural rubber synthetic polyisoprene. Other kinds of synthetic rubbers are: polybutadiene, poly styrene-butadiene-styrene , polychloroprene Neoprene , polyisobutylene Butyl rubber , silicone. Molding shaping the rubber mixture. The rubber must be shaped prior to heating stage since cross-linking makes shaping impossible.

Increased temperature speeds up the vulcanization process resulting in fast and complete cross-linking. C-S bonds replace C-H bonds linking chain polyisoprene molecules. Each link is formed by one to seven sulfur atoms. Polymer structure. Glass transition. It takes about eight hours for vulcanization to be completed, however, certain chemical activators can be introduced to the process to speed up the time.

Each process for vulcanization is detailed and very thorough, meaning you need to know what you are doing to avoid danger or ruining the end result. Pigments can also be added to create colored vulcanized rubber, and chemicals can be added to protect the color and durability. Vulcanized rubber is used to make a variety of items, including the soles of shoes, hoses, hockey pucks, bowling balls, toys, tires, bouncing balls, and much more. Most of the rubber products manufactured are vulcanized.

There are many positives that can come from the vulcanization of rubber. With the vulcanization process, we have access to many more products, luxuries, and abilities than we would have otherwise. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Currently you have JavaScript disabled.

In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. Vulcanisation causes rubber to shrink while still retaining its original shape.

The vulcanisation process also hardens the rubber, making it less susceptible to deformation — particularly compared to non-vulcanised rubber which will deform far more quickly under stress. This hardening of the rubber also increases its tensile strength. Vulcanised rubber is used to manufacture all sorts of products today. Perhaps the best-known and most prevalent use of vulcanised rubber is vehicle tyres, which are commonly combined with the reinforcing agent carbon black for even greater strength.

More than a billion tyres are manufactured worldwide every year, making the tyre industry one of the foremost consumers of vulcanised rubber.