Abstract
Abstract Natural rubber is derived from the Hevea brasiliensis tree. This article summarizes the history of natural rubber with seedlings planted in Malaysia in 1877 through present day production figures. Latex collection and its coagulation produce various types of dry rubber grades. Raw rubber properties, such as crystallization, storage, hardening, cure behavior, and plasticity retention index are covered as is chemistry and technology of natural rubber. The technical advantages of natural rubber, blends with synthetic rubber, vulcanization systems available are outlined. Natural rubber latex's preparation, concentration and properties are described. Uses of natural rubber, as well as its modified forms, are detailed. The major use of natural rubber is for tires. A major concern has been protein allergy in latex rubber gloves and condoms. Ways to prevent these allergies are discussed.
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