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Rubber Technology is the subject dealing with the transformation of rubbers or elastomers into useful products, such as automobile tires, rubber mats and, exercise rubber stretching bands. The materials includes latex, natural rubber, synthetic rubber and other polymeric materials, such as thermoplastic elastomers. Rubber processed through such methods are components of a wide range of items.

Rubber products can be categorized into two main categories.

Dry rubber products (dry form)
Latex (wet rubber) products (liquid form)

Vulcanization

Most rubber products are vulcanized, a process which involves heating with a small quantity of sulphur (or equivalent cross-linking agent) so as to stabilise the polymer chains, over a wide range of temperature. This discovery was made by Charles Goodyear in the 1844, but is a process restricted to polymer chains having a double bond in the backbone.^[1] Such materials include natural rubber and polybutadiene. The range of materials available is much wider however, since all polymers become elastomeric above their glass transition temperature. However, the elastomeric state is unstable because chains can slip past one another resulting in creep or stress relaxation under static or dynamic load conditions. Chemical cross links add the stability to the network that is needed for most practical applications.^{[citation needed]}

Processing of rubber

Methods for processing rubber include mastication and various operations like mixing, calendering, extrusion, all processes being essential to bring crude rubber into a state suitable for shaping the final product. The former breaks down the polymer chains, and lowers their molecular mass so that viscosity is low enough for further processing. After this has been achieved, various additions can be made to the material ready for cross-linking. Rubber may be masticated on a two-roll mill or in an industrial mixer, which come in different types.^[2]

Rubber is first compounded with additives like sulfur, carbon black and accelerators. It is converted into a dough-like mixture which is called "compound" then milled into sheets of desired thickness. Rubber may then be extruded or molded before being cured.

References

^ "What is Vulcanized Rubber?". WiseGEEK. 19 January 2024.
^ "History of Rubber". HowStuffWorks. July 2010.

External links

Latex Technology - What Is Wet Rubber

v t e Rubber
Chemical types	Latex Natural rubber Synthetic rubber Butyl rubber Chloroprene rubber EPDM rubber Nitrile rubber Silicone rubber Styrene-butadiene
Mechanical types	Cold rubber Foam rubber Crumb rubber Micronized rubber powder
Additives	Biodegradable additives Filler (materials) Plasticizer Polymer additive Polymer stabilizers
Rubber processing	Rubber tapping Rubber technology Vulcanization
Industry	Bridgestone Dunlop Goodyear Tire and Rubber Company Michelin Rubber Board Rubber industry in Malaysia Rubber Industry Smallholders Development Authority Rubber Manufacturers Association United States Rubber Company List of tire companies
Products	Rubber band Rubber mulch Rubberized asphalt Tires codes
Waste	Airfield rubber removal Rubber pollution Dioxins Environmental hazards Great Pacific Garbage Patch Persistent organic pollutant Tire-derived fuel Tire recycling
Category Commons

Categories:

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Vulcanization

Processing of rubber

See also

References

External links