How vulcanization improve the properties of natural and synthetic rubber
Answers
Answer:
Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur, which results in three-dimensional cross-linking of the chain rubber molecules (polyisoprene) bonded to each other by sulfur atoms.
There are two general types of rubber:
Natural rubber is produced from latex - milky emulsion drawn from the rubber tree (Hevea brasiliensis) or some other plants. When coagulated latex transforms into soft, plastic and sticky substance (crude rubber), which is then vulcanized (cured). Natural rubber is composed of polyisoprene molecules.
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.
Vulcanization process was invented by Charles Goodyear in 1839.
Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur, which results in three-dimensional cross-linking of the chain rubber molecules (polyisoprene) bonded to each other by sulfur atoms.
There are two general types of rubber:
Natural rubber is produced from latex - milky emulsion drawn from the rubber tree (Hevea brasiliensis) or some other plants. When coagulated latex transforms into soft, plastic and sticky substance (crude rubber), which is then vulcanized (cured). Natural rubber is composed of polyisoprene molecules.
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.
Vulcanization process was invented by Charles Goodyear in 1839.
Explanation: