Nylon+66

BY: RAQUEL ESCOBAR PINEDA//** NYLON 66​
 * //[[image:http://image.tutorvista.com/content/polymers/nylon-66-preparation.gif width="387" height="128" align="right" caption="Preparation of Nylon-66" link="Nylon 66"]]​



__//** Nylon **//__ Nylon is the term used for group of synthetic products. These products are made from chemiacls such as coal,water, air, petroleum, agricultural by porducts, and natural gas. It is one of the most important chemical that has been discovered. It is known for it's tough elastic substance that can be formed into fibers, bristles, sheets, rods, and tubes. It also can be made in powered form for use in molding operations. Nylon fibers and fabric are known for their strength abillity to be dyed, low shrinkage, silk like, appearance and resistance to abrasion,mildew, and insects. They are not harmed by most kinds of oil and grease or by household cleaning fluids. Nylon fabrics dry rapidly because nylon absorbs only some water.

Nylon is used in fibers and fabrics and it was the first synthetic fabric thought to be superior to natural fabrics. Nylon came on the market in 1939. Since then they are use and have been found for nylon including carpets, tires, uphosltery, dresses, underwear and bathing suits. Nylon is also important in the plastic industry.
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__//** How nylon is made **//__ Most nylon produced in the United States is made from two chemical compounds such as hexamethylenediamine and adipic acid. Both of these compounds contain carbon and hydrogen. In the manufacturers they combine the compounds to from hexamethylene-diammonium-adipate, commonly called nylon salt. Most of nylon factories make the substance by placing a solution of nylon salt in a machine that is call an autoclave. This machine heats the solution under pressure. The water is removed and the molecules that make up each of the compounds combine to form a large molecules. This is called polymerization. In some factories, the new formed nylon comes out of the machine as a plastic ribbon. The ribbon is than cooled, hardened, and cut into chips that are used in making a variety of nylon prodacts. When it cames to nylon fibers, they are made by foring molten nylon through tiny holes in a device that is called spinneret. In some other factories the molten nylon can go to the spinneret as soon as the polymerization process is completed. In other factories they melt nylon chips and pump the melted nylon through the spinneret. After the nylon is cool they strech it. When it comes to drawing it only involves unwinding the yarn or filaments from a spool and winding them one another. Drawing makes the mlecules in each filament fall into parallel lines, and this gives it a special texture.

Wallace Carothers was the invention of Nylon and neoprene. In 1930 Wallace along with others researchers for the DuPont company studied chains of molecules. They were interested in what kind of materials they could produce. By the combinations of long chain molecule, and they combined atoms. Doing that they had an interesting way of joining the atoms. That lead them to find out about the produeing of unique materials. * To take good care of your nylon garment= You can wash it separately from other types of fabric,wash in cold water, and use only non- chlorine bleach. //**__ Benefits __**//
 * //__ Facts __//**
 * 1) Maximum temperature: 210 F = 99 C
 * 2) Minimum temperature: -94 F= - 70 C
 * 3) Melting point 420 F= 216 C
 * 4) Tensile strength: 5, 800 psi
 * 1) Variation of luster-It has the ability to be very lustrous or dull.
 * 2) Excellent abrasion resistance
 * 3) Highly resilient-(nylon fabrics are heat-set)


 * 1) Hightly resistance to- insects, fungi, and animals
 * 2) Are used in carpets and nylon stockings
 * 3) Melts instead of burning
 * 4) Have good physical properties
 * 5) Excellent chemical resistance
 * 6) Excellent wear resistance

__//**DISADVANTAGES **//__ *Attacked by oxidizing agents
 * 1) *H igh moisture that can pick up with related dimensional instability
 * 2) *High moisture absorptivity degrades electrical and mechanical properties
 * Attacked by strong acids and bases
 * High notch sensitivity *Nylon can have an unpleasent sheen //__**

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