What are Polymers?

What are Polymers?

Polymers are substances containing a large number of structural units joined by the same type of linkage. These substances often form into a chain-like structure. Polymers in the natural world have been around since the beginning of time. Starch, cellulose, and rubber all possess polymeric properties. Man-made polymers have been studied since 1832. Today, the polymer industry has grown to be larger than the aluminum, copper and steel industries combined.

Polymers already have a range of applications that far exceeds that of any other class of material available to man. Current applications extend from adhesives, coatings, foams, and packaging materials to textile and industrial fibers, elastomers, and structural plastics. Polymers are also used for most composites, electronic devices, biomedical devices, optical devices, and precursors for many newly developed high-tech ceramics.

Applications of Polymers:

Agriculture and Agribusiness

• Polymeric materials are used in and on soil to improve aeration, provide mulch, and promote plant growth and health.

Medicine

• Many biomaterials, especially heart valve replacements and blood vessels, are made of polymers like Dacron, Teflon and polyurethane.

Consumer Science

• Plastic containers of all shapes and sizes are light weight and economically less expensive than the more traditional containers. Clothing, floor coverings, garbage disposal bags, and packaging are other polymer applications.

Industry

• Automobile parts, windshields for fighter planes, pipes, tanks, packing materials, insulation, wood substitutes, adhesives, matrix for composites, and elastomers are all polymer applications used in the industrial market.

Sports

• Playground equipment, various balls, golf clubs, swimming pools, and protective helmets are often produced from polymers.

Polymer Introduction

In the name of Allah...

Definition

A polymer is a substance composed of molecules with large molecular mass composed of repeating structural units, or monomers, connected by covalent chemical bonds.

The term is derived from the Greek words: polys meaning many, and meros meaning parts. The individual molecules which comprise a polymer are referred to as polymer molecules, where the word "polymer" functions as an adjective.

Ex.

Well known examples of polymers include plastics and DNA.