RUBBER

Rubber



Rubber

Introduction

Rubbers - natural or synthetic materials, which are characterized by elasticity, water resistance and insulating properties. Natural rubber is obtained from liquid milk-white, called latex - latex of rubber plants.

In nature, the rubber is in the form of a colloidal suspension in the latex-producing plant rubber. One of these plants is the tree Hevea, native to the Amazon. Another plant producing rubber is the rubber tree, rubber widely used since times for the manufacture of balls, primary instrument of the ball game, sports, religious and symbolic practiced by the ancient Maya. Indonesia, Malaysia, Thailand, China and India currently produces about 90% of rubber natural.

The rubber or rubber latex is the drying of various tropical plants that provide incision in the bark of an elastic fluid, with the highest quality so-called “rubber ".

For the cuts made ??you get a milky fluid that contains the rubber suspension and divided into small droplets of emulsified appearance. As the discharge is relatively abundant, it is collected in special containers in small buckets that hang at the end of the incisions. Then the juice collected is subjected to treatment to solidify by evaporation or coagulation (Warren, 2002).

The rubber is a solid body that has a higher coefficient of expansion known and greatly increases with vulcanization. A recent court rubber raw or uncured, it can re-unite with each other giving sun push against each other. Once cured loses this property, but it becomes more elastic and can be lengthened to six times its original length. The elongation of the rubber vulcanization is accompanied by a rise in temperature and cooling change occurs when it returns to normal.

The rubber tree is obtained through a systematic treatment of "bleeding", which involves making a cut at an angle through the bark to the cambium deepening. A small vessel that hangs on the tree to collect the latex, milky juice that flows slowly from the wound of the tree.

The rubber is made ??from synthetic unsaturated hydrocarbons. Despite the rapid increase in the production of synthetic elastomers, natural rubber and is currently is one of the most important of highly elastic materials.

Types of Rubber, Synthetic

Neoprene

One of the first synthetic rubbers made by Carothers research was neoprene, chloroprene monomer polymer, chemical formula CH 2-C (Cl) CH-CH 2. Chloroprene raw materials are ethyne and hydrochloric acid. Neoprene was developed in 1931 and is resistant to heat and chemicals such as oils and oil. It is used in oil pipelines and as insulation for wires and machinery (Fred, 2005).

Butyl Rubber

This type of rubber synthetic, first produced in 1949, is obtained by copolymerization of isobutylene with butadiene or isoprene. It is plastic and can be worked as rubber natural, but difficult to vulcanize. Although not as flexible as rubber and other synthetic natural, is very resistant to oxidation and corrosive action. Because of its low permeability to gases, is used in inner tubes of car tires.

Buna Rubber Artificial

German chemists synthesized in 1935, the first of a series of synthetic rubbers called Buna, ...