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WHAT IS PLASTIC?

The metals in ancient history, they were known to people for many thousands of years ago. But synthetic materials began to produce only about 60 years ago.

In such a short time they become ingrained in our lives and in many ways superior to the long-known natural materials - rubber, rubber, silicone, chemical fiber.

We don't even think about it, how many around us plastic products. Pens and markers, boxes, TV sets, tape recorders and radios, toys, dishes, furniture and much more - all plastic.

The main advantage of plastics is that their properties can be adjusted and adapted to the requirements of the practice. Synthetic materials have a low density, they have no smell and taste. They stand in relation to atmospheric corrosion, acids and alkalis. In addition, plastic products can be shaped in any form. They are well painted and have excellent thermal and electrical insulation properties.

Almost all plastics are compounds that are derived from crude oil. Polyethylene is used for the manufacture of packaging, pails, bags; polyester - for the production of fabrics and fiber; Perspex (a special type of acrylic alcohol) - for the manufacture of contact lenses, glasses, Windows, seat-belts; polystyrene for the production of disposable containers, utensils; epoxy resin is used to make a strong glue; acrylics - on the production of dyes and certain types of clothing; the PVC skin needed for the production of pipes, hoses, coatings for automobiles.

In 1938 in the United States was first obtained the nylon used to make balls for bearings, clothing, fishing nets and strings of tennis rackets, and so on, Because it was attended by scientists from new York and London, his name was composed of the first letters of these cities Nylon.

All plastics and artificial fibers are a special group of compounds called polymers. All the polymers are composed of chains of interconnected small molecules.

Most synthetic materials, including plastics do not decompose and pollute the environment. Therefore, in recent years, scientists are actively working to create environmentally friendly plastics, which are produced directly from crude oil, and although today are very expensive, but do not cause environmental pollution.

See also:
Can decompose plastic?

 


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