University of Soran college of science

Presenting byZAGROS A. OMAR

SUPERVISER: Mr. ZRAR

2015-2016

OutlineHistory

Iintroduction

Synthesis

Mechanism

Chemical & physical property

Application of nylon

Advantages

Disadvantages

SUMMARY & REFRENCE

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HISTORY

The development of nylon6,6 was started from 1927

by means of many researchers, notably among

them W.H.Carothers. and P.Schlack

Introduction Nylon-6,6 is a type of polymer.It is commonly known as nylon.The IUPAC name for nylon 6,6 is-

Poly[imino(1,6-dioxohexamethylene) imnohexamethylene.

Other name hexane-1, 6 diamine Poly(hexamethylene adipamide), Poly[imino(1,6-dioxohexamethylene) iminohexamethylene]

The simple molecular formula for nylon 6,6 is - C12H22N2O2.

The CAS number is: 32131-17-2The molecular weight is: 262.345840

g/mol.

synthesis• Materials

Hexamethlenediamine (1,6-hexanedi-amine)

Adipic acid, Solvent: tap water and cyclohexane.

H O O ║ ║

H2N-CH2-CH2-CH2-CH2-CH2-CH2-NH + HOC-CH2-CH2-CH2-CH2-COH

H O O │ ║ ║ H2N-CH2-CH2-CH2-CH2-CH2-CH2-N-C-CH2-CH2-CH2-CH2-C-OH + H2O (Nylon 6,6)

Mechanism of preparation nylon is made by a reaction which is a 

step-growth polymerization, and a condensation polymerization. Nylons are made from diacids and diamines. If you want to see what adipic acid and hexamethylene diamine

Physical Properties• Elasticity: Breaking extension is 20-40%.• Stiffness: 20-40 gm/den.• Moisture regain: 3.5-5%.• Specific gravity: 1.14.• Abrasion resistance: Excellent.• Dimensional stability: Good.• Resiliency: Excellent.• Softening point: Nylon 6,6 – 229 °C• Melting point: Nylon 6,6 – 252 °C• Hand feel: Soft and smooth.

Chemical Properties

Alkali: Nylon is substantially inert to alkalis. Organic solvent: Most of the solvent have little or no effect on nylon. Light: No discoloration. Biological: Neither micro organism nor moth, larvae attack nylon. Electrical: High insulating propertiesFlammability: Burns slowly.Extremely chemically stable

Application of nylon Nylon 6-6 is frequently used when high mechanical strength, great rigidity, and good stability under heat is required . It is used for: pipes, various machine parts. carpet fiberes

airbags, tyres, ropes Etc….

.

AdvantagesHigh elongation Nylon 6,6 is very stable.Heat resistanceChemical resistance to hydrocarbonsHigh resistance to: insects, fungi and animals,

molds, mildew, rot Nylon 6,6 has  high tensile strength Used in carpets and nylon stockings Melts instead of burning Highly resilientUsed in many military applicationsUsed in the industry

Disadvantages

- Requires UV stabilization - High water absorption-Poor chemical resistance to strong acids and bases

- Attacked by oxidizing agents

- Attacked by strong acids and bases

Etc…

Referenceshttp://www.textoscientificos.com/polimeros/nylon http://www.educar.org/inventos/nylon.asp 4/05/2012 http://www.salesianosalameda.cl/biblioteca/Pol%C3%ADmeros%20Sint%C3%A9ticos(1).pdf http://upcommons.upc.edu/pfc/bitstream/2099.1/4536/3/Anexo%20%20B.pdf http://monografias.umcc.cu/monos/2002/Eleno%20Alfonso.pdf

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ANY QUESTION? Time for discussion.&